roughleg vs Buteo lagopus

roughleg and Buteo lagopus both are nouns.

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

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

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

Other synonyms of roughleg include rough-legged hawk.

roughleg (noun)	Buteo lagopus (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