silverback vs gorilla

silverback and gorilla both are nouns.

Word	Noun	Adjective	Verb	Adverb
silverback	Yes	No	No	No
gorilla	Yes	No	No	No

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

silverback: an adult male gorilla with grey hairs across the back
gorilla: largest anthropoid ape; terrestrial and vegetarian; of forests of central west Africa

Other hypernyms of silverback include Gorilla gorilla.

silverback (noun)	gorilla (noun)
an adult male gorilla with grey hairs across the back	largest anthropoid ape; terrestrial and vegetarian; of forests of central west Africa