muscadine vs grapevine

muscadine and grapevine both are nouns.

Word	Noun	Adjective	Verb	Adverb
muscadine	Yes	No	No	No
grapevine	Yes	No	No	No

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

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

Other hypernyms of muscadine include grape, grape vine.

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