/ Thesaurus / T Synonyms of thermal reactor Find synonyms for: Noun1. thermal reactor, nuclear reactor, reactorusage: a nuclear reactor in which nuclear fissions are caused by neutrons that are slowed down by a moderatorWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: ravenous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language