Medicago echinus vs medick

Medicago echinus and medick both are nouns.

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

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

Medicago echinus: an annual of the Mediterranean area having spiny seed pods and leaves with dark spots
medick: any of several Old World herbs of the genus Medicago having small flowers and trifoliate compound leaves

Other hypernyms of Medicago echinus include medic, trefoil.

Medicago echinus (noun)	medick (noun)
an annual of the Mediterranean area having spiny seed pods and leaves with dark spots	any of several Old World herbs of the genus Medicago having small flowers and trifoliate compound leaves