pond apple vs custard apple

pond apple and custard apple both are nouns.

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

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

pond apple: ovoid yellow fruit with very fragrant peach-colored flesh; related to custard apples
custard apple: the fruit of any of several tropical American trees of the genus Annona having soft edible pulp

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

pond apple: small evergreen tree of tropical America with edible fruit; used chiefly as grafting stock
custard apple: any of several tropical American trees bearing fruit with soft edible pulp

Other hypernyms of pond apple include custard apple tree.

pond apple (noun)	custard apple (noun)
ovoid yellow fruit with very fragrant peach-colored flesh; related to custard apples	the fruit of any of several tropical American trees of the genus Annona having soft edible pulp
small evergreen tree of tropical America with edible fruit; used chiefly as grafting stock	any of several tropical American trees bearing fruit with soft edible pulp