oysters Rockefeller vs huitre

oysters Rockefeller and huitre both are nouns.

Word	Noun	Adjective	Verb	Adverb
oysters Rockefeller	Yes	No	No	No
huitre	Yes	No	No	No

As nouns, huitre is a hypernym of oysters Rockefeller; that is, huitre is a word with a broader meaning than oysters Rockefeller:

oysters Rockefeller: oysters spread with butter and spinach and seasonings and baked on the half shell
huitre: edible body of any of numerous oysters

Other hypernyms of oysters Rockefeller include oyster.

oysters Rockefeller (noun)	huitre (noun)
oysters spread with butter and spinach and seasonings and baked on the half shell	edible body of any of numerous oysters