Breadcrumb Home > Thesaurus > W Synonyms of witnesser Find synonyms for: Noun1. witness, witnesser, informant, perceiver, percipient, observer, beholder, speaker, talker, utterer, verbalizer, verbaliserusage: someone who sees an event and reports what happenedWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. ✖ Related Content Daily Word Quiz: legerdemain Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language