Synonyms of certainty in English:

certainty


See definition of certainty

noun

1‘she knew with certainty that he was telling the truth’

SYNONYMS

confidence, sureness, positiveness, conviction, certitude, reliability, assuredness, assurance, validity, conclusiveness, authoritativeness, truth, fact, factualness

ANTONYMS

uncertainty, doubt

2‘he accepted defeat as a certainty’

SYNONYMS

inevitability, necessity, foregone conclusion, predictable result, matter of course, racing certainty

certain winner

informal sure thing, cert, dead cert, sure-fire winner

ANTONYMS

possibility, impossibility