/ Thesaurus / P Synonyms of phylum platyhelminthes Find synonyms for: Noun1. Platyhelminthes, phylum Platyhelminthes, phylumusage: flatwormsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language