muscadine vs grape vine

muscadine and grape vine both are nouns.

Word	Noun	Adjective	Verb	Adverb
muscadine	Yes	No	No	No
grape vine	Yes	No	No	No

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

muscadine: native grape of southeastern United States; origin of many cultivated varieties
grape vine: any of numerous woody vines of genus Vitis bearing clusters of edible berries

Other hypernyms of muscadine include grape, grapevine.

muscadine (noun)	grape vine (noun)
dull-purple grape of southern United States	any of numerous woody vines of genus Vitis bearing clusters of edible berries
native grape of southeastern United States; origin of many cultivated varieties