Felis onca vs jaguar

Felis onca and jaguar both are nouns.

Word	Noun	Adjective	Verb	Adverb
Felis onca	Yes	No	No	No
jaguar	Yes	No	No	No

As nouns, Felis onca and jaguar are synonyms defined as:

Felis onca and jaguar: a large spotted feline of tropical America similar to the leopard; in some classifications considered a member of the genus Felis

Other synonyms of Felis onca include panther, Panthera onca.

Felis onca (noun)	jaguar (noun)
a large spotted feline of tropical America similar to the leopard; in some classifications considered a member of the genus Felis	a large spotted feline of tropical America similar to the leopard; in some classifications considered a member of the genus Felis