shepherd's pouch vs crucifer

shepherd's pouch and crucifer both are nouns.

Word	Noun	Adjective	Verb	Adverb
shepherd's pouch	Yes	No	No	No
crucifer	Yes	No	No	No

As nouns, crucifer is a hypernym of shepherd's pouch; that is, crucifer is a word with a broader meaning than shepherd's pouch:

shepherd's pouch: white-flowered annual European herb bearing triangular notched pods; nearly cosmopolitan as an introduced weed
crucifer: any of various plants of the family Cruciferae

Other hypernyms of shepherd's pouch include cruciferous plant.

shepherd's pouch (noun)	crucifer (noun)
white-flowered annual European herb bearing triangular notched pods; nearly cosmopolitan as an introduced weed	any of various plants of the family Cruciferae