cougar vs Felis concolor

cougar and Felis concolor both are nouns.

Word	Noun	Adjective	Verb	Adverb
cougar	Yes	No	No	No
Felis concolor	Yes	No	No	No

As nouns, cougar and Felis concolor are synonyms defined as:

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

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