/ Thesaurus / I Synonyms of interest group Find synonyms for: Noun1. interest, interest group, social groupusage: (usually plural) a social group whose members control some field of activity and who have common aims; "the iron interests stepped up production"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language