brussels sprouts vs Brassica oleracea gemmifera

brussels sprouts and Brassica oleracea gemmifera both are nouns.

Word	Noun	Adjective	Verb	Adverb
brussels sprouts	Yes	No	No	No
Brassica oleracea gemmifera	Yes	No	No	No

brussels sprouts (noun)	Brassica oleracea gemmifera (noun)
the small edible cabbage-like buds growing along a stalk of the brussels sprout plant	plant grown for its stout stalks of edible small green heads resembling diminutive cabbages