goldfish vs cyprinid

goldfish and cyprinid both are nouns.

Word	Noun	Adjective	Verb	Adverb
goldfish	Yes	No	No	No
cyprinid	Yes	Yes	No	No

As nouns, cyprinid is a hypernym of goldfish; that is, cyprinid is a word with a broader meaning than goldfish:

goldfish: small golden or orange-red freshwater fishes of Eurasia used as pond or aquarium fishes
cyprinid: soft-finned mainly freshwater fishes typically having toothless jaws and cycloid scales

Other hypernyms of goldfish include cyprinid fish.

goldfish (noun)	cyprinid (noun)
small golden or orange-red freshwater fishes of Eurasia used as pond or aquarium fishes	soft-finned mainly freshwater fishes typically having toothless jaws and cycloid scales

goldfish (adjective)	cyprinid (adjective)
	of or relating to members of fish family Cyprinidae