Pyrus vs rosid dicot genus

Pyrus and rosid dicot genus both are nouns.

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

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

Pyrus (noun)	rosid dicot genus (noun)
fruit trees native to the Old World: pears	a genus of dicotyledonous plants