spinach mustard vs crucifer

spinach mustard and crucifer both are nouns.

Word	Noun	Adjective	Verb	Adverb
spinach mustard	Yes	No	No	No
crucifer	Yes	No	No	No

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

spinach mustard: Asiatic plant cultivated for its swollen root crown and edible foliage
crucifer: any of various plants of the family Cruciferae

Other hypernyms of spinach mustard include cruciferous plant.

spinach mustard (noun)	crucifer (noun)
Asiatic plant cultivated for its swollen root crown and edible foliage	any of various plants of the family Cruciferae