Brassicaceae vs genus Sisymbrium

Brassicaceae and genus Sisymbrium both are nouns.

Word	Noun	Adjective	Verb	Adverb
Brassicaceae	Yes	No	No	No
genus Sisymbrium	Yes	No	No	No

Brassicaceae (noun)	genus Sisymbrium (noun)
a large family of plants with four-petaled flowers; includes mustards, cabbages, broccoli, turnips, cresses, and their many relatives	genus of Old World annual or biennial or perennial herbs with racemose flowers; many are considered to be weeds