Arachis vs rosid dicot genus

Arachis and rosid dicot genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Arachis	Yes	No	No	No
rosid dicot genus	Yes	No	No	No

As nouns, rosid dicot genus is a hypernym of Arachis; that is, rosid dicot genus is a word with a broader meaning than Arachis:

Arachis (noun)	rosid dicot genus (noun)
a genus of plants with pods that ripen underground (see peanut)	a genus of dicotyledonous plants