Cucurbita vs genus Cucurbita

Cucurbita and genus Cucurbita both are nouns.

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

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

Cucurbita (noun)	genus Cucurbita (noun)
type genus of the Cucurbitaceae	type genus of the Cucurbitaceae