class Cestoda vs parasitic worm

class Cestoda and parasitic worm both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Cestoda	Yes	No	No	No
parasitic worm	Yes	No	No	No

class Cestoda (noun)	parasitic worm (noun)
a class of parasitic flatworms (Cestoda)	worm that is parasitic on the intestines of vertebrates especially roundworms and tapeworms and flukes