Zinfandel vs vinifera

Zinfandel and vinifera both are nouns.

Word	Noun	Adjective	Verb	Adverb
Zinfandel	Yes	No	No	No
vinifera	Yes	No	No	No

As nouns, vinifera is a hypernym of Zinfandel; that is, vinifera is a word with a broader meaning than Zinfandel:

Zinfandel: small black grape grown chiefly in California; transplanted from Europe
vinifera: common European grape cultivated in many varieties; chief source of Old World wine and table grapes

Other hypernyms of Zinfandel include common grape vine, vinifera grape, Vitis vinifera.

Zinfandel (noun)	vinifera (noun)
small black grape grown chiefly in California; transplanted from Europe	common European grape cultivated in many varieties; chief source of Old World wine and table grapes