Papilionoideae vs Lens

Papilionoideae and Lens both are nouns.

Word	Noun	Adjective	Verb	Adverb
Papilionoideae	Yes	No	No	No
Lens	Yes	No	No	No

Papilionoideae (noun)	Lens (noun)
alternative name used in some classification systems for the family Papilionaceae	genus of small erect or climbing herbs with pinnate leaves and small inconspicuous white flowers and small flattened pods: lentils