Papilionoideae vs genus Cercis

Papilionoideae and genus Cercis both are nouns.

Word	Noun	Adjective	Verb	Adverb
Papilionoideae	Yes	No	No	No
genus Cercis	Yes	No	No	No

Papilionoideae (noun)	genus Cercis (noun)
alternative name used in some classification systems for the family Papilionaceae	deciduous shrubs and trees of eastern Asia, southern Europe and the United States