mountain lion vs Felis concolor

mountain lion and Felis concolor both are nouns.

Word	Noun	Adjective	Verb	Adverb
mountain lion	Yes	No	No	No
Felis concolor	Yes	No	No	No

As nouns, mountain lion and Felis concolor are synonyms defined as:

mountain lion and Felis concolor: large American feline resembling a lion

Other synonyms of mountain lion include catamount, cougar, painter, panther, puma.

mountain lion (noun)	Felis concolor (noun)
large American feline resembling a lion	large American feline resembling a lion