Swainsona vs rosid dicot genus

Swainsona and rosid dicot genus both are nouns.

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

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

Swainsona (noun)	rosid dicot genus (noun)
a genus of Australian herbs and subshrubs: darling peas	a genus of dicotyledonous plants