/ Thesaurus / P Synonyms of parasitic worm Find synonyms for: Noun1. helminth, parasitic worm, wormusage: worm that is parasitic on the intestines of vertebrates especially roundworms and tapeworms and flukesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: fresco Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language