black medick vs medic

black medick and medic both are nouns.

Word	Noun	Adjective	Verb	Adverb
black medick	Yes	No	No	No
medic	Yes	No	No	No

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

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

Other hypernyms of black medick include medick, trefoil.

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