subfamily Papilionoideae vs Laburnum

subfamily Papilionoideae and Laburnum both are nouns.

Word	Noun	Adjective	Verb	Adverb
subfamily Papilionoideae	Yes	No	No	No
Laburnum	Yes	No	No	No

subfamily Papilionoideae (noun)	Laburnum (noun)
alternative name used in some classification systems for the family Papilionaceae	flowering shrubs or trees having bright yellow flowers; all parts of the plant are poisonous