/ Thesaurus / H Synonyms of half hour Find synonyms for: Noun1. half-hour, 30 minutes, time unit, unit of timeusage: a half of an hourWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: charlatan Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language