pak choi vs Brassica rapa chinensis

pak choi and Brassica rapa chinensis both are nouns.

Word	Noun	Adjective	Verb	Adverb
pak choi	Yes	No	No	No
Brassica rapa chinensis	Yes	No	No	No

As nouns, pak choi and Brassica rapa chinensis are synonyms defined as:

pak choi and Brassica rapa chinensis: Asiatic plant grown for its cluster of edible white stalks with dark green leaves

Other synonyms of pak choi include bok choi, bok choy, Chinese white cabbage, pakchoi.

pak choi (noun)	Brassica rapa chinensis (noun)
Asiatic plant grown for its cluster of edible white stalks with dark green leaves	Asiatic plant grown for its cluster of edible white stalks with dark green leaves