Felis concolor vs mountain lion

Felis concolor and mountain lion both are nouns.

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

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

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

Other synonyms of Felis concolor include catamount, cougar, painter, panther, puma.

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