Breadcrumb Home > Thesaurus > G Synonyms of gym Find synonyms for: Noun 1. gymnasium, gym, athletic facility usage: athletic facility equipped for sports or physical training WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of gym (Dictionary) ✖ Related Content Daily Word Quiz: umbrage Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language