spinach mustard vs Brassica rapa perviridis

spinach mustard and Brassica rapa perviridis both are nouns.

Word	Noun	Adjective	Verb	Adverb
spinach mustard	Yes	No	No	No
Brassica rapa perviridis	Yes	No	No	No

As nouns, spinach mustard and Brassica rapa perviridis are synonyms defined as:

spinach mustard and Brassica rapa perviridis: Asiatic plant cultivated for its swollen root crown and edible foliage

Other synonyms of spinach mustard include Brassica perviridis, tendergreen.

spinach mustard (noun)	Brassica rapa perviridis (noun)
Asiatic plant cultivated for its swollen root crown and edible foliage	Asiatic plant cultivated for its swollen root crown and edible foliage