pe-tsai vs cruciferous plant

pe-tsai and cruciferous plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
pe-tsai	Yes	No	No	No
cruciferous plant	Yes	No	No	No

As nouns, cruciferous plant is a hypernym of pe-tsai; that is, cruciferous plant is a word with a broader meaning than pe-tsai:

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

Other hypernyms of pe-tsai include crucifer.

pe-tsai (noun)	cruciferous plant (noun)
plant with an elongated head of broad stalked leaves resembling celery; used as a vegetable in east Asia	any of various plants of the family Cruciferae