/ Thesaurus / B Synonyms of best man Find synonyms for: Noun1. best man, groomsmanusage: the principal groomsman at a weddingWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: sumptuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language