polychaete vs polychaete worm

polychaete and polychaete worm both are nouns.

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

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

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

Other synonyms of polychaete include polychete, polychete worm.

polychaete (noun)	polychaete 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