annon vs custard apple

annon and custard apple both are nouns.

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

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

annon: sweet pulpy tropical fruit with thick scaly rind and shiny black seeds
custard apple: the fruit of any of several tropical American trees of the genus Annona having soft edible pulp

annon (noun)	custard apple (noun)
sweet pulpy tropical fruit with thick scaly rind and shiny black seeds	the fruit of any of several tropical American trees of the genus Annona having soft edible pulp
	any of several tropical American trees bearing fruit with soft edible pulp