genus Erythrina vs subfamily Papilionoideae

genus Erythrina and subfamily Papilionoideae both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Erythrina	Yes	No	No	No
subfamily Papilionoideae	Yes	No	No	No

genus Erythrina (noun)	subfamily Papilionoideae (noun)
genus of attractive tropical shrubs or trees with usually red flowers	alternative name used in some classification systems for the family Papilionaceae