bok choy vs pakchoi

bok choy and pakchoi both are nouns.

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

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

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

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

bok choy (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