Lens vs genus Lens

Lens and genus Lens both are nouns.

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

As nouns, Lens and genus Lens are synonyms defined as:

Lens and genus Lens: genus of small erect or climbing herbs with pinnate leaves and small inconspicuous white flowers and small flattened pods: lentils

Lens (noun)	genus Lens (noun)
genus of small erect or climbing herbs with pinnate leaves and small inconspicuous white flowers and small flattened pods: lentils	genus of small erect or climbing herbs with pinnate leaves and small inconspicuous white flowers and small flattened pods: lentils