Medicago vs Papilionoideae

Medicago and Papilionoideae both are nouns.

Word	Noun	Adjective	Verb	Adverb
Medicago	Yes	No	No	No
Papilionoideae	Yes	No	No	No

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

Medicago: a genus of herbs that resemble clover
Papilionoideae: alternative name used in some classification systems for the family Papilionaceae

Other hypernyms of Medicago include rosid dicot genus, subfamily Papilionoideae.

Medicago (noun)	Papilionoideae (noun)
a genus of herbs that resemble clover	alternative name used in some classification systems for the family Papilionaceae