Bananas, doddery, capricious, a bit lacking, and away with the fairies are all synonyms for unstable. Stable and steady are these antonyms of unstable. And here are another 102 synonyms for unstable.
Unstable Synonyms
1. unsteady
- Doddery
- Insecure
- Movable
- Not secure
- Precarious
- Rickety
- Rocky
- Shaky
- Teetering
- Tottering
- Tottery
- Unbalanced
- Unfastened
- Unreliable
- Unsafe
- Unsecured
- Unsteady
- Wobbling
- Wobbly
- Bockety
2. variable
- Capricious
- Changeable
- Erratic
- Fickle
- Fitful
- Fluctuating
- Inconsistent
- Inconstant
- Irregular
- Mercurial
- Uncertain
- Unpredictable
- Unreliable
- Unsettled
- Variable
- Volatile
- Wavering
- Peaky
3. unbalanced
- A bit lacking
- Away with the fairies
- Bananas
- Barking mad
- Barking
- Barmy
- Bats
- Batty
- Bonkers
- Buggy
- Cracked
- Crackers
- Crackpot
- Crazed
- Crazy
- Cuckoo
- Daft as a brush
- Daft
- Demented
- Deranged
- Dippy
- Distracted
- Disturbed
- Dotty
- Insane
- Loony
- Loopy
- Lunatic
- Mad as a March hare
- Mad as a hatter
- Mad
- Mental
- Mentally ill
- Mixed up
- Neurotic
- Non compos mentis
- Not all there
- Not in one's right mind
- Not the full shilling
- Nuts
- Nutso
- Nutsy
- Nutty as a fruitcake
- Nutty
- Of unsound mind
- Off one's head
- Off one's trolley/rocker
- Out of one's mind/head
- Out to lunch
- Potty
- Psychotic
- Raving mad
- Round the bend
- Round the twist
- Screwed up
- Screwy
- Sectionable
- Squirrelly
- Troubled
- Unbalanced
- Unhinged
- Wacko
- Touched