parasitic worm vs helminth

parasitic worm and helminth both are nouns.

Word	Noun	Adjective	Verb	Adverb
parasitic worm	Yes	No	No	No
helminth	Yes	No	No	No

As nouns, parasitic worm and helminth are synonyms defined as:

parasitic worm and helminth: worm that is parasitic on the intestines of vertebrates especially roundworms and tapeworms and flukes

parasitic worm (noun)	helminth (noun)
worm that is parasitic on the intestines of vertebrates especially roundworms and tapeworms and flukes	worm that is parasitic on the intestines of vertebrates especially roundworms and tapeworms and flukes