leopard vs Panthera pardus

leopard and Panthera pardus both are nouns.

Word	Noun	Adjective	Verb	Adverb
leopard	Yes	No	No	No
Panthera pardus	Yes	No	No	No

As nouns, leopard and Panthera pardus are synonyms defined as:

leopard and Panthera pardus: large feline of African and Asian forests usually having a tawny coat with black spots

leopard (noun)	Panthera pardus (noun)
large feline of African and Asian forests usually having a tawny coat with black spots	large feline of African and Asian forests usually having a tawny coat with black spots
the pelt of a leopard