/ Thesaurus / C Synonyms of compound interest Find synonyms for: Noun1. compound interest, interestusage: interest calculated on both the principal and the accrued interestWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: kiln Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language