bok choi vs Brassica rapa chinensis

bok choi and Brassica rapa chinensis both are nouns.

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

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

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

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

bok choi (noun)	Brassica rapa chinensis (noun)
elongated head of dark green leaves on thick white stalks	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