/ Thesaurus / N Synonyms of nonthermal Find synonyms for: Adjective1. nonthermal (vs. thermal)usage: not involving heat; "nonthermal luminescence"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language