/ Thesaurus / C Synonyms of crasher Find synonyms for: Noun1. gatecrasher, crasher, unwelcome guest, intruder, interloper, trespasserusage: someone who gets in (to a party) without an invitation or without payingWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: devout Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language