polychaete vs polychete worm

polychaete and polychete worm both are nouns.

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

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

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

Other synonyms of polychaete include polychaete worm, polychete.

polychaete (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