indian mustard vs gai choi

indian mustard and gai choi both are nouns.

Word	Noun	Adjective	Verb	Adverb
indian mustard	Yes	No	No	No
gai choi	Yes	No	No	No

As nouns, indian mustard and gai choi are synonyms defined as:

Other synonyms of indian mustard include Brassica juncea, chinese mustard, leaf mustard.

indian mustard (noun)	gai choi (noun)
Asiatic mustard used as a potherb	Asiatic mustard used as a potherb