/ Thesaurus / W Synonyms of watt hour Find synonyms for: Noun1. watt-hour, work unit, heat unit, energy unitusage: a unit of energy equal to the power of one watt operating for one hourWordNet 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