marsh hawk vs hen harrier

marsh hawk and hen harrier both are nouns.

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

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

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

Other synonyms of marsh hawk include Circus cyaneus, northern harrier.

marsh hawk (noun)	hen harrier (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