/ Thesaurus / O Synonyms of off the clock Find synonyms for: Adverb1. off-the-clockusage: overtime without extra compensation; "she often has to work off-the-clock"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language