Brassica oleracea vs wild cabbage

Brassica oleracea and wild cabbage both are nouns.

Word	Noun	Adjective	Verb	Adverb
Brassica oleracea	Yes	No	No	No
wild cabbage	Yes	No	No	No

As nouns, Brassica oleracea and wild cabbage are synonyms defined as:

Brassica oleracea and wild cabbage: wild original of cultivated cabbages; common in western coastal Europe

Brassica oleracea (noun)	wild cabbage (noun)
wild original of cultivated cabbages; common in western coastal Europe	wild original of cultivated cabbages; common in western coastal Europe
any of various cultivars of the genus Brassica oleracea grown for their edible leaves or flowers