platyctenean vs ctenophore

platyctenean and ctenophore both are nouns.

Word	Noun	Adjective	Verb	Adverb
platyctenean	Yes	No	No	No
ctenophore	Yes	No	No	No

As nouns, ctenophore is a hypernym of platyctenean; that is, ctenophore is a word with a broader meaning than platyctenean:

platyctenean: ctenophore have long tentacles and flattened body
ctenophore: biradially symmetrical hermaphroditic solitary marine animals resembling jellyfishes having for locomotion eight rows of cilia arranged like teeth in a comb

Other hypernyms of platyctenean include comb jelly.

platyctenean (noun)	ctenophore (noun)
ctenophore have long tentacles and flattened body	biradially symmetrical hermaphroditic solitary marine animals resembling jellyfishes having for locomotion eight rows of cilia arranged like teeth in a comb