Buteo lagopus vs roughleg

Buteo lagopus and roughleg both are nouns.

Word	Noun	Adjective	Verb	Adverb
Buteo lagopus	Yes	No	No	No
roughleg	Yes	No	No	No

As nouns, Buteo lagopus and roughleg are synonyms defined as:

Buteo lagopus and roughleg: large hawk of the Northern Hemisphere that feeds chiefly on small rodents and is beneficial to farmers

Other synonyms of Buteo lagopus include rough-legged hawk.

Buteo lagopus (noun)	roughleg (noun)
large hawk of the Northern Hemisphere that feeds chiefly on small rodents and is beneficial to farmers	large hawk of the Northern Hemisphere that feeds chiefly on small rodents and is beneficial to farmers