oyster vs blue point

oyster and blue point both are nouns.

Word	Noun	Adjective	Verb	Adverb
oyster	Yes	No	Yes	No
blue point	Yes	No	No	No

As nouns, blue point is a hyponym of oyster; that is, blue point is a word with a more specific, narrower meaning than oyster:

oyster: marine mollusks having a rough irregular shell; found on the sea bed mostly in coastal waters
blue point: small edible oyster typically from the southern shore of Long Island

As nouns, blue point is a hyponym of oyster; that is, blue point is a word with a more specific, narrower meaning than oyster:

oyster: edible body of any of numerous oysters
blue point: oysters originally from Long Island Sound but now from anywhere along the northeastern seacoast; usually eaten raw

Other hyponyms of oyster include oysters Rockefeller, bluepoint.

oyster (noun)	blue point (noun)
marine mollusks having a rough irregular shell; found on the sea bed mostly in coastal waters	small edible oyster typically from the southern shore of Long Island
edible body of any of numerous oysters	oysters originally from Long Island Sound but now from anywhere along the northeastern seacoast; usually eaten raw
a small muscle on each side of the back of a fowl

oyster (verb)	blue point (verb)
gather oysters, dig oysters