bluehead vs wrasse

bluehead and wrasse both are nouns.

Word	Noun	Adjective	Verb	Adverb
bluehead	Yes	No	No	No
wrasse	Yes	No	No	No

As nouns, wrasse is a hypernym of bluehead; that is, wrasse is a word with a broader meaning than bluehead:

bluehead: small Atlantic wrasse the male of which has a brilliant blue head
wrasse: chiefly tropical marine fishes with fleshy lips and powerful teeth; usually brightly colored

bluehead (noun)	wrasse (noun)
small Atlantic wrasse the male of which has a brilliant blue head	chiefly tropical marine fishes with fleshy lips and powerful teeth; usually brightly colored