Circus cyaneus vs harrier

Circus cyaneus and harrier both are nouns.

Word	Noun	Adjective	Verb	Adverb
Circus cyaneus	Yes	No	No	No
harrier	Yes	No	No	No

As nouns, harrier is a hypernym of Circus cyaneus; that is, harrier is a word with a broader meaning than Circus cyaneus:

Circus cyaneus: common harrier of North America and Europe; nests in marshes and open land
harrier: hawks that hunt over meadows and marshes and prey on small terrestrial animals

Circus cyaneus (noun)	harrier (noun)
common harrier of North America and Europe; nests in marshes and open land	hawks that hunt over meadows and marshes and prey on small terrestrial animals
	a hound that resembles a foxhound but is smaller; used to hunt rabbits
	a persistent attacker