watercress vs Brassicaceae

watercress and Brassicaceae both are nouns.

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

watercress (noun)	Brassicaceae (noun)
cresses that grow in clear ponds and streams	a large family of plants with four-petaled flowers; includes mustards, cabbages, broccoli, turnips, cresses, and their many relatives
any of several water-loving cresses

watercress (adjective)	Brassicaceae (adjective)
of a moderate yellow-green color that is greener and deeper than moss green and yellower and darker than pea green