Certainly synonyms such as by all means, assuredly, admittedly, absolutely, and affirmative. Certainly is an adverb, and its antonyms are no and possibly. Additionally, here are 50 synonyms and nearby words for certainly as well as words beginning with C, Ce, Cer, Cert, and Certa.
50 synonyms for certainly
1. assuredly
as sure as eggs is eggs
assuredly
beyond doubt
beyond question
conclusively
evidently
incontestably
incontrovertibly
indisputably
indubitably
irrefutably
manifestly
obviously
palpably
patently
plainly
there are no two ways about it
transparently
undeniably
undisputedly
unequivocally
unmistakably
unquestionably
without question
2. admittedly
admittedly
beyond question
without a doubt
without question
3. absolutely
affirmative
by all means
naturally
positively
rather
unquestionably
without doubt
without question