/ Thesaurus / S Synonyms of spur of the moment Find synonyms for: Adjective1. spur-of-the-moment, unprepared (vs. prepared)usage: in response to an unforeseen need; "a spur-of-the-moment party"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language