Carya vs genus Carya

Carya and genus Carya both are nouns.

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

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

Carya and genus Carya: genus of large deciduous nut-bearing trees; United States and China

Carya (noun)	genus Carya (noun)
genus of large deciduous nut-bearing trees; United States and China	genus of large deciduous nut-bearing trees; United States and China