catamount vs panther

catamount and panther both are nouns.

Word	Noun	Adjective	Verb	Adverb
catamount	Yes	No	No	No
panther	Yes	No	No	No

As nouns, catamount and panther are synonyms defined as:

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

catamount (noun)	panther (noun)
large American feline resembling a lion	a leopard in the black color phase
short-tailed wildcats with usually tufted ears; valued for their fur	a large spotted feline of tropical America similar to the leopard; in some classifications considered a member of the genus Felis
	large American feline resembling a lion