Epinephelus fulvus vs grouper

Epinephelus fulvus and grouper both are nouns.

Word	Noun	Adjective	Verb	Adverb
Epinephelus fulvus	Yes	No	No	No
grouper	Yes	No	No	No

As nouns, grouper is a hypernym of Epinephelus fulvus; that is, grouper is a word with a broader meaning than Epinephelus fulvus:

Epinephelus fulvus: black-spotted usually dusky-colored fish with reddish fins
grouper: usually solitary bottom sea basses of warm seas

Epinephelus fulvus (noun)	grouper (noun)
black-spotted usually dusky-colored fish with reddish fins	usually solitary bottom sea basses of warm seas
	flesh of a saltwater fish similar to sea bass