napa vs celery cabbage

napa and celery cabbage both are nouns.

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

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

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

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

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