/ Thesaurus / C Synonyms of cert. Find synonyms for: Noun1. cert, certainty, sure thing, foregone conclusionusage: an absolute certainty; "it's a dead cert"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language