shepherd's purse vs crucifer

shepherd's purse and crucifer both are nouns.

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

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

shepherd's purse: 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 purse include cruciferous plant.

shepherd's purse (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