leopardess vs Panthera pardus

leopardess and Panthera pardus both are nouns.

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

As nouns, Panthera pardus is a hypernym of leopardess; that is, Panthera pardus is a word with a broader meaning than leopardess:

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

Other hypernyms of leopardess include leopard.

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