/ Thesaurus / F Synonyms of frat house Find synonyms for: Noun1. chapterhouse, fraternity house, frat house, houseusage: a house used as a residence by a chapter of a fraternityWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language