Chinese cabbage vs napa

Chinese cabbage and napa both are nouns.

Word	Noun	Adjective	Verb	Adverb
Chinese cabbage	Yes	No	No	No
napa	Yes	No	No	No

As nouns, Chinese cabbage and napa are synonyms defined as:

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

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

Chinese cabbage (noun)	napa (noun)
elongated head of crisp celery-like stalks and light green leaves	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