polychaete worm vs polychete worm

polychaete worm and polychete worm both are nouns.

Word	Noun	Adjective	Verb	Adverb
polychaete worm	Yes	No	No	No
polychete worm	Yes	No	No	No

As nouns, polychaete worm and polychete worm are synonyms defined as:

polychaete worm and polychete worm: chiefly marine annelids possessing both sexes and having paired appendages (parapodia) bearing bristles

Other synonyms of polychaete worm include polychaete, polychete.

polychaete worm (noun)	polychete worm (noun)
chiefly marine annelids possessing both sexes and having paired appendages (parapodia) bearing bristles	chiefly marine annelids possessing both sexes and having paired appendages (parapodia) bearing bristles