/ Thesaurus / P Synonyms of phylum cnidaria Find synonyms for: Noun1. Cnidaria, phylum Cnidaria, Coelenterata, phylum Coelenterata, phylumusage: hydras; polyps; jellyfishes; sea anemones; coralsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language