/ Thesaurus / P Synonyms of powerwash Find synonyms for: Verb1. pressure-wash, powerwash, wash, launderusage: wash before painting to remove old paint and mildew; "pressure-wash the house"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: pristine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language