Brassica rapa vs turnip

Brassica rapa and turnip both are nouns.

Word	Noun	Adjective	Verb	Adverb
Brassica rapa	Yes	No	No	No
turnip	Yes	No	No	No

As nouns, Brassica rapa and turnip are synonyms defined as:

Brassica rapa and turnip: widely cultivated plant having a large fleshy edible white or yellow root

Other synonyms of Brassica rapa include white turnip.

Brassica rapa (noun)	turnip (noun)
widely cultivated plant having a large fleshy edible white or yellow root	root of any of several members of the mustard family
	widely cultivated plant having a large fleshy edible white or yellow root