maypop vs passionflower

maypop and passionflower both are nouns.

Word	Noun	Adjective	Verb	Adverb
maypop	Yes	No	No	No
passionflower	Yes	No	No	No

As nouns, passionflower is a hypernym of maypop; that is, passionflower is a word with a broader meaning than maypop:

maypop: of southern United States; having an insipid berry the size of a hen egg
passionflower: any of various chiefly tropical American vines some bearing edible fruit

Other hypernyms of maypop include passionflower vine.

maypop (noun)	passionflower (noun)
of southern United States; having an insipid berry the size of a hen egg	any of various chiefly tropical American vines some bearing edible fruit