Brassicaceae vs Brassica

Brassicaceae and Brassica both are nouns.

Word	Noun	Adjective	Verb	Adverb
Brassicaceae	Yes	No	No	No
Brassica	Yes	No	No	No

Brassicaceae (noun)	Brassica (noun)
a large family of plants with four-petaled flowers; includes mustards, cabbages, broccoli, turnips, cresses, and their many relatives	mustards: cabbages, cauliflowers, turnips, etc.