/ Thesaurus / A Synonyms of attester Find synonyms for: Noun1. attester, attestant, witness, witnesser, informantusage: someone who affirms or vouches for the correctness or truth or genuineness of somethingWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: effervescent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language