radish plant vs crucifer

radish plant and crucifer both are nouns.

Word	Noun	Adjective	Verb	Adverb
radish plant	Yes	No	No	No
crucifer	Yes	No	No	No

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

radish plant: a cruciferous plant of the genus Raphanus having a pungent edible root
crucifer: any of various plants of the family Cruciferae

Other hypernyms of radish plant include cruciferous plant.

radish plant (noun)	crucifer (noun)
a cruciferous plant of the genus Raphanus having a pungent edible root	any of various plants of the family Cruciferae