Words that start with I

Browse 155 words that start with "I" and obtain a full synonym list for those words. You can use our I-words collection anywhere, as it is completely free to use.

There are 1 1-letter word, 4 2-letter words, 3 3-letter words, 4 4-letter words, 7 5-letter words, 12 6-letter words, and 13 7-letter words that start with "I."

For longer words, there are 29 8-letter words, 18 9-letter words, 23 10-letter words, 21 11-letter words, 5 12-letter words, 10 13-letter words, 4 14-letter words, and 1 16-letter word that start with "I."

1 Letter Words that start with I

I
- Synonyms: myself, personally, I personally
- Opposites: You, We
- Part of speech: Pronoun

2 Letter Words that start with I

Is
- Synonyms: Exists, Be, Represents
- Opposites: Isn't Or Is Not
- Part of speech: Verb
If
- Synonyms: on condition that, provided (that), providing (that)
- Opposites: Unless, Certainly, Definitely
- Part of speech: Conjunction
It
- Synonyms: This, That, The thing
- Opposites: Them, Those
- Part of speech: Pronoun
In
- Synonyms: inside, within, in the middle of
- Opposites: Outside, Out
- Part of speech: Preposition

3 Letter Words that start with I

Ink
- Synonyms: Pigment, Dye, Stain
- Opposites: Erase, Paper
- Part of speech: Noun
Ion
- Synonyms: Charged particle, Atom, Cation
- Opposites: Neutral Atom, Uncharged Particle
- Part of speech: Noun
Ice
- Synonyms: frozen water, icicle, iceberg
- Opposites: Fire, Heat
- Part of speech: Noun

4 Letter Words that start with I

Item
- Synonyms: thing, article, object
- Opposites: Whole, Entirety
- Part of speech: Noun
Idol
- Synonyms: icon, god, image
- Opposites: Critic, Opponent
- Part of speech: Noun
Idea
- Synonyms: plan, design, scheme
- Opposites: Fact, Reality
- Part of speech: Noun
Into
- Synonyms: inside, within, entering
- Opposites: Out Of, Away From
- Part of speech: Preposition

5 Letter Words that start with I

In On
- Synonyms: privy to, aware of, acquainted with
- Opposites: Excluded, Out Of
- Part of speech: Preposition
Items
- Synonyms: Objects, Things, Articles
- Opposites: Whole, Totality
- Part of speech: Noun
Imply
- Synonyms: implicit, indirect, hinted
- Opposites: Explicit, Direct
- Part of speech: Verb
Image
- Synonyms: likeness, resemblance, depiction
- Opposites: Reality, Void
- Part of speech: Noun
Idiot
- Synonyms: fool, halfwit, nincompoop
- Opposites: Genius, Intellectual
- Part of speech: Noun
Input
- Synonyms: Contribution, Feedback, Insight
- Opposites: Output, Withdrawal
- Part of speech: Verb
Ideal
- Synonyms: perfect, best possible, consummate
- Opposites: Imperfect, Subpar
- Part of speech: Adjective

6 Letter Words that start with I

Ironic
- Synonyms: sarcastic, sardonic, dry
- Opposites: Sincere, Straightforward
- Part of speech: Adjective
Income
- Synonyms: earnings, salary, pay
- Opposites: Expenditure, Outgoings
- Part of speech: Noun
Impose
- Synonyms: foist, force, thrust
- Opposites: Permit, Allow
- Part of speech: Verb
Innate
- Synonyms: inborn, natural, inbred
- Opposites: Acquired, Learned
- Part of speech: Adjective
Ignore
- Synonyms: disregard, take no notice of, pay no attention to
- Opposites: Pay Attention To, Acknowledge, Obey
- Part of speech: Verb
Insane
- Synonyms: mentally ill, severely mentally disordered, of unsound mind
- Opposites: Sane, Calm
- Part of speech: Adjective
Intend
- Synonyms: plan, mean, have the/every intention
- Opposites: Disregard, Neglect
- Part of speech: Verb
Iconic
- Synonyms: legendary, celebrated, famous
- Opposites: Insignificant, Unremarkable
- Part of speech: Adjective
Impact
- Synonyms: collision, crash, smash
- Opposites: Insignificance, Irrelevance
- Part of speech: Noun
Indeed
- Synonyms: as expected, to be sure, in fact
- Opposites: Moderately, Slightly, By No Means
- Part of speech: Adverb
Issues
- Synonyms: matter, matter in question, affair
- Opposites: Withdraw, Impotence
- Part of speech: Noun
Inside
- Synonyms: interior, inner part, inner side
- Opposites: Outside, Exterior
- Part of speech: Preposition

7 Letter Words that start with I

Incline
- Synonyms: disposed, minded, of a mind
- Opposites: Disinclined, Unlikely, Raise, Lift
- Part of speech: Verb
Imposed
- Synonyms: Enforced, Forced, Dictated
- Opposites: Removed, Lifted
- Part of speech: Verb
In Time
- Synonyms: early enough, in good time, punctually
- Opposites: Late, Never
- Part of speech: Adverb
Isolate
- Synonyms: separate, set apart, segregate
- Opposites: Integrate, Confuse
- Part of speech: Verb
Ignored
- Synonyms: Overlooked, Neglected, Disregarded
- Opposites: Acknowledged, Noticed
- Part of speech: Adjective
Initial
- Synonyms: beginning, opening, commencing
- Opposites: Final, Reject, Repeal
- Part of speech: Adjective
Immense
- Synonyms: huge, vast, massive
- Opposites: Tiny, Minuscule
- Part of speech: Adjective
Inspire
- Synonyms: stimulate, motivate, cause
- Opposites: Uninspiring, Dull
- Part of speech: Verb
In Fact
- Synonyms: actually, in actuality, in actual fact
- Opposites: In Theory, On The Contrary
- Part of speech: Adverb
Instead
- Synonyms: as an alternative, as a substitute, as a replacement
- Opposites: As Well, As Well As
- Part of speech: Adverb
Involve
- Synonyms: require, necessitate, demand
- Opposites: Exclude, Preclude
- Part of speech: Verb
Intense
- Synonyms: great, acute, enormous
- Opposites: Mild, Apathetic
- Part of speech: Adjective
Insight
- Synonyms: intuition, perception, awareness
- Opposites: Unwise, Dense
- Part of speech: Noun

8 Letter Words that start with I

Instinct
- Synonyms: Impulse, Reflex, Intuition
- Opposites: Reason, Deliberation
- Part of speech: Noun
Immature
- Synonyms: unripe, not ripe, not mature
- Opposites: Ripe, Mature
- Part of speech: Adjective
Inclined
- Synonyms: Likely, Prone, Disposed
- Opposites: Disinclined, Unwilling
- Part of speech: Adjective
Irritate
- Synonyms: annoy, vex, make angry
- Opposites: Pacify, Contented, Good-humoured
- Part of speech: Verb
Insecure
- Synonyms: unconfident, lacking confidence, lacking self-confidence
- Opposites: Confident, Assured
- Part of speech: Adjective
Ideology
- Synonyms: beliefs, ideas, ideals
- Opposites: Indifference, Apathy
- Part of speech: Noun
Illusion
- Synonyms: mirage, hallucination, apparition
- Opposites: Reality, Truth
- Part of speech: Noun
Inferior
- Synonyms: lower in status, lesser, second-class
- Opposites: Superior, Senior
- Part of speech: Adjective
Isolated
- Synonyms: remote, out of the way, outlying
- Opposites: Accessible, Sociable
- Part of speech: Adjective
In Ruins
- Synonyms: derelict, ruined, gone to rack and ruin
- Opposites: Intact, Flourishing
- Part of speech: Noun
Incident
- Synonyms: event, occurrence, occasion
- Opposites: Normalcy, Non-occurrence
- Part of speech: Noun
Increase
- Synonyms: grow, get bigger, get larger
- Opposites: Decrease, Reduce
- Part of speech: Verb
Intended
- Synonyms: deliberate, intentional, calculated
- Opposites: Accidental, Unplanned
- Part of speech: Adjective
Instance
- Synonyms: example, occasion, occurrence
- Opposites: Absence, Nonoccurrence
- Part of speech: Noun
Integral
- Synonyms: essential, fundamental, basic
- Opposites: Incidental, Peripheral
- Part of speech: Adjective
Identify
- Synonyms: recognize, single out, pick out
- Opposites: Ignore, Overlook
- Part of speech: Verb
Inherent
- Synonyms: intrinsic, innate, immanent
- Opposites: Acquired, Alien
- Part of speech: Adjective
Intimate
- Synonyms: close, bosom, boon
- Opposites: Distant, Formal, Cold
- Part of speech: Adjective
Intrigue
- Synonyms: interest, be of interest to, fascinate
- Opposites: Bore, Disinterest
- Part of speech: Verb
Industry
- Synonyms: manufacturing, production, fabrication
- Opposites: Indolence, Agriculture
- Part of speech: Noun
In Depth
- Synonyms: thoroughly, extensively, comprehensively
- Opposites: Superficially, Shallow
- Part of speech: Adjective
Identity
- Synonyms: name, specification, identification
- Opposites: Anonymity, Disguise
- Part of speech: Noun
Ignorant
- Synonyms: uneducated, unknowledgeable, untaught
- Opposites: Educated, Knowledgeable
- Part of speech: Adjective
In Doubt
- Synonyms: doubtful, uncertain, open to question
- Opposites: Sure, Confident
- Part of speech: Noun
Innocent
- Synonyms: guiltless, guilt-free, not guilty
- Opposites: Guilty, Corrupt
- Part of speech: Adjective
Inspired
- Synonyms: Motivated, Encouraged, Stimulated
- Opposites: Uninspired, Disheartened
- Part of speech: Adjective
Involved
- Synonyms: associated with, connected with, concerned with
- Opposites: Unconnected, Straightforward, Simple, Uninterested
- Part of speech: Adjective
Indicate
- Synonyms: designate, specify, stipulate
- Opposites: Conceal, Mislead
- Part of speech: Verb
Interest
- Synonyms: attentiveness, undivided attention, absorption
- Opposites: Boredom, Disinterest
- Part of speech: Noun

9 Letter Words that start with I

Intuitive
- Synonyms: instinctive, intuitional, instinctual
- Opposites: Logical, Rational
- Part of speech: Adjective
Irritated
- Synonyms: Annoyed, Frustrated, Aggravated
- Opposites: Calm, Content
- Part of speech: Adjective
Inclusion
- Synonyms: incorporation, addition, insertion
- Opposites: Exclusion, Omission
- Part of speech: Noun
Inability
- Synonyms: lack of ability, incapability, incapacity
- Opposites: Ability, Capability
- Part of speech: Noun
Important
- Synonyms: main, chief, principal
- Opposites: Unimportant, Inessential, Irrelevant
- Part of speech: Adjective
Impulsive
- Synonyms: impetuous, spontaneous, hasty
- Opposites: Cautious, Premeditated
- Part of speech: Adjective
Intricate
- Synonyms: complex, complicated, convoluted
- Opposites: Simple, Straightforward
- Part of speech: Adjective
Incentive
- Synonyms: inducement, motivation, motive
- Opposites: Deterrent, Disincentive
- Part of speech: Noun
In Demand
- Synonyms: sought-after, desired, coveted
- Opposites: Demand, Unwanted
- Part of speech: Adjective
Incorrect
- Synonyms: wrong, mistaken, in error
- Opposites: Correct, Accurate
- Part of speech: Adjective
Injustice
- Synonyms: Unfairness, Inequity, Wrongdoing
- Opposites: Justice, Fairness
- Part of speech: Noun
Inclusive
- Synonyms: all-in, all-inclusive, with everything included
- Opposites: Exclusive, Excluding
- Part of speech: Adjective
In Theory
- Synonyms: in principle, on paper, in the abstract
- Opposites: In Practice, In Reality
- Part of speech: Adverb
Intention
- Synonyms: aim, purpose, intent
- Opposites: Inadvertency, Accident
- Part of speech: Noun
Impactful
- Synonyms: Influential, Powerful, Significant
- Opposites: Ineffective, Insignificant
- Part of speech: Adjective
Including
- Synonyms: Incorporating, Encompassing, Containing
- Opposites: Excluding, Omitting
- Part of speech: Preposition
Integrity
- Synonyms: honesty, uprightness, probity
- Opposites: Dishonesty, Division, Fragility
- Part of speech: Noun
Insurance
- Synonyms: indemnity, indemnification, (financial) protection
- Opposites: Endangerment, Harm
- Part of speech: Noun

10 Letter Words that start with I

In The Raw
- Synonyms: naked, nude, bare
- Opposites: Clothed, Dressed
- Part of speech: Adverb
Irrational
- Synonyms: unreasonable, illogical, groundless
- Opposites: Rational, Logical
- Part of speech: Adjective
Intertwine
- Synonyms: entwine, interweave, interlace
- Opposites: Separate, Untangle
- Part of speech: Verb
Indigenous
- Synonyms: native, endemic, local
- Opposites: Non-native, Introduced, Imported
- Part of speech: Adjective
Inequality
- Synonyms: imbalance, inequity, unevenness
- Opposites: Equality, Uniformity
- Part of speech: Noun
Incomplete
- Synonyms: deficient, insufficient, imperfect
- Opposites: Complete, Finished
- Part of speech: Adjective
In Private
- Synonyms: in secret, secretly, in secrecy
- Opposites: In Public, Openly
- Part of speech: Adverb
In Fashion
- Synonyms: fashionable, in vogue, up to date
- Opposites: Out Of Style, Outdated
- Part of speech: Preposition
Impression
- Synonyms: feeling, sense, fancy
- Opposites: Neglect, Disregard
- Part of speech: Noun
Intimidate
- Synonyms: frighten, menace, terrify
- Opposites: Reassure, Comfort
- Part of speech: Verb
Invaluable
- Synonyms: indispensable, crucial, critical
- Opposites: Dispensable, Superfluous
- Part of speech: Adjective
Irrelevant
- Synonyms: beside the point, not to the point, immaterial
- Opposites: Relevant , Pertinent
- Part of speech: Adjective
Identified
- Synonyms: Recognized, Determined, Named
- Opposites: Unidentified, Misidentified
- Part of speech: Adjective
In General
- Synonyms: generally, normally, as a (general) rule
- Opposites: Particular, Specifically
- Part of speech: Adverb
Imperative
- Synonyms: vitally important, of vital importance, all-important
- Opposites: Unimportant, Optional
- Part of speech: Adjective
Inadequate
- Synonyms: insufficient, not enough, deficient
- Opposites: Adequate, Sufficient, Competent
- Part of speech: Adjective
Inevitable
- Synonyms: unavoidable, inescapable, bound to happen
- Opposites: Avoidable, Uncertain
- Part of speech: Adjective
Impossible
- Synonyms: not possible, out of the question, not worth considering
- Opposites: Possible, Easy, Attainable
- Part of speech: Adjective
Impressive
- Synonyms: magnificent, majestic, imposing
- Opposites: Unimpressive, Ordinary, Mediocre
- Part of speech: Adjective
Initiative
- Synonyms: enterprise, inventiveness, resourcefulness
- Opposites: Inertia, Laziness
- Part of speech: Noun
Individual
- Synonyms: Person, Entity, Character
- Opposites: Group, Collective
- Part of speech: Adjective
Innovative
- Synonyms: Creative, Pioneering, Groundbreaking
- Opposites: Conventional, Outdated
- Part of speech: Adjective
Incredible
- Synonyms: unbelievable, beyond belief, hard to believe
- Opposites: Believable, Likely, Unspectacular
- Part of speech: Adjective

11 Letter Words that start with I

Intertwined
- Synonyms: Interwoven, Entangled, Twisted together
- Opposites: Separated, Untangled
- Part of speech: Verb
In Light Of
- Synonyms: Considering, Given, Because of
- Opposites: Despite, Regardless Of
- Part of speech: Preposition
Ineffective
- Synonyms: unsuccessful, non-successful, unproductive
- Opposites: Effective, Efficient
- Part of speech: Adjective
Instruction
- Synonyms: order, command, directive
- Opposites: Confusion, Misguidance
- Part of speech: Noun
Institution
- Synonyms: organization, establishment, institute
- Opposites: Dismissal, Defrocking, Halting, Cancellation, Ending
- Part of speech: Noun
Imagination
- Synonyms: imaginative faculty, creative power, fancy
- Opposites: Reality, Fact
- Part of speech: Noun
In Practice
- Synonyms: In reality, In action, In use
- Opposites: In Theory, In Conceptually
- Part of speech: Adverb
Incorporate
- Synonyms: embody, include, comprise
- Opposites: Exclude, Separate
- Part of speech: Verb
Indifferent
- Synonyms: unconcerned about, apathetic about/towards, uncaring about
- Opposites: Heedful, Caring
- Part of speech: Adjective
In Addition
- Synonyms: additionally, as well, what's more
- Opposites: In Contrast, Excluding
- Part of speech: Adverb
Information
- Synonyms: details, particulars, facts
- Opposites: Misinformation, Ignorance
- Part of speech: Noun
Influential
- Synonyms: powerful, authoritative, dominant
- Opposites: Unimportant, Insignificant
- Part of speech: Adjective
In Order To
- Synonyms: To, So as to, For the purpose of
- Opposites: In Spite Of, Without
- Part of speech: Conjunction
Informative
- Synonyms: instructive, instructional, illuminating
- Opposites: Uninformative, Unhelpful
- Part of speech: Adjective
Implication
- Synonyms: suggestion, inference, insinuation
- Opposites: Explicit, Statement
- Part of speech: Noun
Intelligent
- Synonyms: clever, bright, brilliant
- Opposites: Stupid, Non-rational
- Part of speech: Adjective
Independent
- Synonyms: freethinking, individualistic, unconventional
- Opposites: Constrained, Orthodox
- Part of speech: Adjective
Interaction
- Synonyms: interplay, interchange, interactivity
- Opposites: Isolation, Separation
- Part of speech: Noun
Immediately
- Synonyms: straight away, at once, right away
- Opposites: Eventually, Delayed
- Part of speech: Adverb
Improvement
- Synonyms: advance, development, upgrade
- Opposites: Deterioration, Regress
- Part of speech: Noun
Interesting
- Synonyms: Absorbing, Alluring, Appealing
- Opposites: Boring, Uninteresting
- Part of speech: Adjective

12 Letter Words that start with I

Inconsistent
- Synonyms: incompatible with, conflicting with, in conflict with
- Opposites: Consistent, Steady
- Part of speech: Adjective
Intimidating
- Synonyms: Frightening, Alarming, Daunting
- Opposites: Comforting, Reassuring
- Part of speech: Adjective
Insufficient
- Synonyms: inadequate, not enough, too little
- Opposites: Sufficient, Adequate
- Part of speech: Adjective
Intervention
- Synonyms: Interference, Mediation, Intercession
- Opposites: Withdrawal, Noninterference
- Part of speech: Noun
Introduction
- Synonyms: institution, establishment, initiation
- Opposites: Abolition, Afterword, Appendix
- Part of speech: Noun

13 Letter Words that start with I

In Particular
- Synonyms: Specifically, Especially, Particularly
- Opposites: General, Overall
- Part of speech: Adverb
Indispensable
- Synonyms: essential, crucial, necessary
- Opposites: Dispensable, Superfluous, Non-essential
- Part of speech: Adjective
Irresponsible
- Synonyms: reckless, rash, careless
- Opposites: Responsible, Sensible, Serious
- Part of speech: Adjective
Inconsiderate
- Synonyms: thoughtless, unthinking, insensitive
- Opposites: Considerate, Thoughtful
- Part of speech: Adjective
Insignificant
- Synonyms: unimportant, of minor importance, of no importance
- Opposites: Significant, Important, Meaningful
- Part of speech: Adjective
Inconvenience
- Synonyms: trouble, bother, problems
- Opposites: Help, Convenience
- Part of speech: Noun
Investigation
- Synonyms: examination, inquiry, study
- Opposites: Neglect, Ignorance
- Part of speech: Noun
Inappropriate
- Synonyms: unsuitable, unfitting, ill-suited
- Opposites: Appropriate, Suitable
- Part of speech: Adjective
In Conclusion
- Synonyms: finally, lastly, in closing
- Opposites: In The Beginning, Initially
- Part of speech: Noun
In My Opinion
- Synonyms: I believe, I think, Personally, I feel
- Opposites: Factually, Objectively
- Part of speech: Preposition

14 Letter Words that start with I

Infrastructure
- Synonyms: Framework, Foundation, Base
- Opposites: Dismantling, Disorganization
- Part of speech: Noun
Interpretation
- Synonyms: explanation, elucidation, expounding
- Opposites: Misinterpretation, Misunderstanding
- Part of speech: Noun
Implementation
- Synonyms: execution, application, carrying out
- Opposites: Abandonment, Neglect
- Part of speech: Noun
In Actual Fact
- Synonyms: really, in fact, in actuality
- Opposites: In Theory, In Reality
- Part of speech: Adverb

16 Letter Words that start with I

In The Region Of
- Synonyms: approximately, about, around
- Opposites: Exactly, Precisely
- Part of speech: Preposition

Fullsynonyms.com