pakchoi vs Chinese white cabbage

pakchoi and Chinese white cabbage both are nouns.

Word	Noun	Adjective	Verb	Adverb
pakchoi	Yes	No	No	No
Chinese white cabbage	Yes	No	No	No

As nouns, pakchoi and Chinese white cabbage are synonyms defined as:

pakchoi and Chinese white cabbage: Asiatic plant grown for its cluster of edible white stalks with dark green leaves

Other synonyms of pakchoi include bok choi, bok choy, Brassica rapa chinensis, pak choi.

pakchoi (noun)	Chinese white cabbage (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