/ Thesaurus / R Synonyms of rain wash Find synonyms for: Noun1. rain-wash, washout, washusage: the washing away of soil or other loose material by rainWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: grimace Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language