genus Cyprinus vs domestic carp

genus Cyprinus and domestic carp both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Cyprinus	Yes	No	No	No
domestic carp	Yes	No	No	No

genus Cyprinus (noun)	domestic carp (noun)
type genus of the family Cyprinidae: carp	large Old World freshwater bottom-feeding fish introduced into Europe from Asia; inhabits ponds and sluggish streams and often raised for food; introduced into United States where it has become a pest