northern harrier vs marsh hawk

northern harrier and marsh hawk both are nouns.

Word	Noun	Adjective	Verb	Adverb
northern harrier	Yes	No	No	No
marsh hawk	Yes	No	No	No

As nouns, northern harrier and marsh hawk are synonyms defined as:

northern harrier and marsh hawk: common harrier of North America and Europe; nests in marshes and open land

Other synonyms of northern harrier include Circus cyaneus, hen harrier.

northern harrier (noun)	marsh hawk (noun)
common harrier of North America and Europe; nests in marshes and open land	common harrier of North America and Europe; nests in marshes and open land