/ Thesaurus / S Synonyms of skin rash Find synonyms for: Noun1. rash, roseola, efflorescence, skin rash, eruptionusage: any red eruption of the skinWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language