/ Thesaurus / C Synonyms of cardinal number Find synonyms for: Noun1. cardinal number, cardinal, numberusage: the number of elements in a mathematical set; denotes a quantity but not the orderWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: cosmology Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language