genus Arabidopsis vs mustard family

genus Arabidopsis and mustard family both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Arabidopsis	Yes	No	No	No
mustard family	Yes	No	No	No

genus Arabidopsis (noun)	mustard family (noun)
a genus of the mustard family having white or yellow or purplish flowers; closely related to genus Arabis	a large family of plants with four-petaled flowers; includes mustards, cabbages, broccoli, turnips, cresses, and their many relatives