family Brassicaceae vs genus Cochlearia

family Brassicaceae and genus Cochlearia both are nouns.

Word	Noun	Adjective	Verb	Adverb
family Brassicaceae	Yes	No	No	No
genus Cochlearia	Yes	No	No	No

family Brassicaceae (noun)	genus Cochlearia (noun)
a large family of plants with four-petaled flowers; includes mustards, cabbages, broccoli, turnips, cresses, and their many relatives	a genus of the family Cruciferae, commonly known as scurvy-grass (Cochlearia)