family Brassicaceae vs genus Thlaspi

family Brassicaceae and genus Thlaspi both are nouns.

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

family Brassicaceae (noun)	genus Thlaspi (noun)
a large family of plants with four-petaled flowers; includes mustards, cabbages, broccoli, turnips, cresses, and their many relatives	herbs of temperate regions: pennycress