bloodworm vs polychete

bloodworm and polychete both are nouns.

Word	Noun	Adjective	Verb	Adverb
bloodworm	Yes	No	No	No
polychete	Yes	No	No	No

As nouns, polychete is a hypernym of bloodworm; that is, polychete is a word with a broader meaning than bloodworm:

bloodworm: a segmented marine worm with bright red body; often used for bait
polychete: chiefly marine annelids possessing both sexes and having paired appendages (parapodia) bearing bristles

Other hypernyms of bloodworm include polychaete, polychaete worm, polychete worm.

bloodworm (noun)	polychete (noun)
a segmented marine worm with bright red body; often used for bait	chiefly marine annelids possessing both sexes and having paired appendages (parapodia) bearing bristles