genus Acacia vs subfamily Mimosoideae

genus Acacia and subfamily Mimosoideae both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Acacia	Yes	No	No	No
subfamily Mimosoideae	Yes	No	No	No

genus Acacia (noun)	subfamily Mimosoideae (noun)
large genus of shrubs and trees and some woody vines of Central and South America, Africa, Australia and Polynesia: wattle; mimosa	alternative name used in some classification systems for the family Mimosaceae