/ Thesaurus / W Synonyms of water heater Find synonyms for: Noun1. water heater, hot-water heater, hot-water tank, heater, warmer, tank, storage tankusage: a heater and storage tank to supply heated waterWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language