cabbage vs genus Brassica

cabbage and genus Brassica both are nouns.

Word	Noun	Adjective	Verb	Adverb
cabbage	Yes	No	Yes	No
genus Brassica	Yes	No	No	No

cabbage (noun)	genus Brassica (noun)
any of various types of cabbage	mustards: cabbages, cauliflowers, turnips, etc.
any of various cultivars of the genus Brassica oleracea grown for their edible leaves or flowers
informal terms for money

cabbage (verb)	genus Brassica (verb)
make off with belongings of others