/ Thesaurus / B Synonyms of burst in on Find synonyms for: Verb1. burst in on, burst upon, interrupt, disrupt, break up, cut offusage: spring suddenly; "He burst upon our conversation"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: industrious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language