pe-tsai vs napa

pe-tsai and napa both are nouns.

Word	Noun	Adjective	Verb	Adverb
pe-tsai	Yes	No	No	No
napa	Yes	No	No	No

As nouns, pe-tsai and napa are synonyms defined as:

pe-tsai and napa: plant with an elongated head of broad stalked leaves resembling celery; used as a vegetable in east Asia

Other synonyms of pe-tsai include Brassica rapa pekinensis, celery cabbage, Chinese cabbage.

pe-tsai (noun)	napa (noun)
plant with an elongated head of broad stalked leaves resembling celery; used as a vegetable in east Asia	plant with an elongated head of broad stalked leaves resembling celery; used as a vegetable in east Asia