/ Thesaurus / F Synonyms of first quarter Find synonyms for: Noun1. first quarter, half-moonusage: the first fourth of the Moon's period of revolution around the EarthWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language