/ Thesaurus / 2 Synonyms of 20 Find synonyms for: Noun1. twenty, 20, XX, large integerusage: the cardinal number that is the sum of nineteen and oneAdjective1. twenty, 20, xx, cardinal (vs. ordinal)usage: denoting a quantity consisting of 20 items or unitsWordNet 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