Gorilla gorilla vs pongid

Gorilla gorilla and pongid both are nouns.

Word	Noun	Adjective	Verb	Adverb
Gorilla gorilla	Yes	No	No	No
pongid	Yes	No	No	No

As nouns, pongid is a hypernym of Gorilla gorilla; that is, pongid is a word with a broader meaning than Gorilla gorilla:

Gorilla gorilla: largest anthropoid ape; terrestrial and vegetarian; of forests of central west Africa
pongid: any of the large anthropoid apes of the family Pongidae

Other hypernyms of Gorilla gorilla include great ape.

Gorilla gorilla (noun)	pongid (noun)
largest anthropoid ape; terrestrial and vegetarian; of forests of central west Africa	any of the large anthropoid apes of the family Pongidae