muscat vs Vitis vinifera

muscat and Vitis vinifera both are nouns.

Word	Noun	Adjective	Verb	Adverb
muscat	Yes	No	No	No
Vitis vinifera	Yes	No	No	No

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

muscat: any of several cultivated grapevines that produce sweet white grapes
Vitis vinifera: common European grape cultivated in many varieties; chief source of Old World wine and table grapes

Other hypernyms of muscat include common grape vine, vinifera, vinifera grape.

muscat (noun)	Vitis vinifera (noun)
sweet aromatic grape used for raisins and wine	common European grape cultivated in many varieties; chief source of Old World wine and table grapes
wine from muscat grapes
any of several cultivated grapevines that produce sweet white grapes