Zinfandel vs vinifera grape

Zinfandel and vinifera grape both are nouns.

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

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

Zinfandel: small black grape grown chiefly in California; transplanted from Europe
vinifera grape: 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, Vitis vinifera.

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