muscat vs muscat grape

muscat and muscat grape both are nouns.

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

As nouns, muscat and muscat grape are synonyms defined as:

Other synonyms of muscat include muscatel.

muscat (noun)	muscat grape (noun)
sweet aromatic grape used for raisins and wine	sweet aromatic grape used for raisins and wine
wine from muscat grapes
any of several cultivated grapevines that produce sweet white grapes