Medicago lupulina vs medick

Medicago lupulina and medick both are nouns.

Word	Noun	Adjective	Verb	Adverb
Medicago lupulina	Yes	No	No	No
medick	Yes	No	No	No

As nouns, medick is a hypernym of Medicago lupulina; that is, medick is a word with a broader meaning than Medicago lupulina:

Medicago lupulina: prostrate European herb with small yellow flowers and curved black pods; naturalized in North America
medick: any of several Old World herbs of the genus Medicago having small flowers and trifoliate compound leaves

Other hypernyms of Medicago lupulina include medic, trefoil.

Medicago lupulina (noun)	medick (noun)
prostrate European herb with small yellow flowers and curved black pods; naturalized in North America	any of several Old World herbs of the genus Medicago having small flowers and trifoliate compound leaves