celery cabbage vs crucifer

celery cabbage and crucifer both are nouns.

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

As nouns, crucifer is a hypernym of celery cabbage; that is, crucifer is a word with a broader meaning than celery cabbage:

celery cabbage: plant with an elongated head of broad stalked leaves resembling celery; used as a vegetable in east Asia
crucifer: any of various plants of the family Cruciferae

Other hypernyms of celery cabbage include cruciferous plant.

celery cabbage (noun)	crucifer (noun)
elongated head of crisp celery-like stalks and light green leaves	any of various plants of the family Cruciferae
plant with an elongated head of broad stalked leaves resembling celery; used as a vegetable in east Asia