papaw vs custard apple

papaw and custard apple both are nouns.

Word	Noun	Adjective	Verb	Adverb
papaw	Yes	No	No	No
custard apple	Yes	No	No	No

As nouns, custard apple is a hypernym of papaw; that is, custard apple is a word with a broader meaning than papaw:

papaw: small tree native to the eastern United States having oblong leaves and fleshy fruit
custard apple: any of several tropical American trees bearing fruit with soft edible pulp

Other hypernyms of papaw include custard apple tree.

papaw (noun)	custard apple (noun)
fruit with yellow flesh; related to custard apples	the fruit of any of several tropical American trees of the genus Annona having soft edible pulp
small tree native to the eastern United States having oblong leaves and fleshy fruit	any of several tropical American trees bearing fruit with soft edible pulp