/ Thesaurus / C Synonyms of charge per unit Find synonyms for: Noun1. rate, charge per unit, chargeusage: amount of a charge or payment relative to some basis; "a 10-minute phone call at that rate would cost $5"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: devout Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language