/ Thesaurus / O Synonyms of ordinary annuity Find synonyms for: Noun1. ordinary annuity, annuity, renteusage: an annuity paid in a series of more or less equal payments at the end of equally spaced periodsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language