turnip cabbage vs Brassica napus napobrassica

turnip cabbage and Brassica napus napobrassica both are nouns.

Word	Noun	Adjective	Verb	Adverb
turnip cabbage	Yes	No	No	No
Brassica napus napobrassica	Yes	No	No	No

As nouns, turnip cabbage and Brassica napus napobrassica are synonyms defined as:

turnip cabbage and Brassica napus napobrassica: a cruciferous plant with a thick bulbous edible yellow root

Other synonyms of turnip cabbage include rutabaga, rutabaga plant, swede, Swedish turnip.

turnip cabbage (noun)	Brassica napus napobrassica (noun)
fleshy turnip-shaped edible stem of the kohlrabi plant	a cruciferous plant with a thick bulbous edible yellow root
a cruciferous plant with a thick bulbous edible yellow root