grape vs vinifera grape

grape and vinifera grape both are nouns.

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

As nouns, vinifera grape is a hyponym of grape; that is, vinifera grape is a word with a more specific, narrower meaning than grape:

grape: any of various juicy fruit of the genus Vitis with green or purple skins; grow in clusters
vinifera grape: grape from a cultivated variety of the common grape vine of Europe

Other hyponyms of grape include bullace grape, muscadine, slipskin grape.

As nouns, vinifera grape is a hyponym of grape; that is, vinifera grape is a word with a more specific, narrower meaning than grape:

grape: any of numerous woody vines of genus Vitis bearing clusters of edible berries
vinifera grape: common European grape cultivated in many varieties; chief source of Old World wine and table grapes

grape (noun)	vinifera grape (noun)
a cluster of small projectiles fired together from a cannon to produce a hail of shot	grape from a cultivated variety of the common grape vine of Europe
any of various juicy fruit of the genus Vitis with green or purple skins; grow in clusters	common European grape cultivated in many varieties; chief source of Old World wine and table grapes
any of numerous woody vines of genus Vitis bearing clusters of edible berries