Laburnum vs subfamily Papilionoideae

Laburnum and subfamily Papilionoideae both are nouns.

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

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