bok choi vs pakchoi

bok choi and pakchoi both are nouns.

Word	Noun	Adjective	Verb	Adverb
bok choi	Yes	No	No	No
pakchoi	Yes	No	No	No

As nouns, bok choi and pakchoi are synonyms defined as:

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

Other synonyms of bok choi include bok choy, Brassica rapa chinensis, Chinese white cabbage, pak choi.

bok choi (noun)	pakchoi (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