/ Thesaurus / H Synonyms of half slip Find synonyms for: Noun1. petticoat, half-slip, underskirt, undergarment, unmentionableusage: undergarment worn under a skirtWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language