/ Thesaurus / O Synonyms of one off Find synonyms for: Noun1. one-off, happening, occurrence, occurrent, natural eventusage: a happening that occurs only once and is not repeatedWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: coincidence Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language