sweetsop vs custard apple tree

sweetsop and custard apple tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
sweetsop	Yes	No	No	No
custard apple tree	Yes	No	No	No

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

sweetsop: tropical American tree bearing sweet pulpy fruit with thick scaly rind and shiny black seeds
custard apple tree: any of several tropical American trees bearing fruit with soft edible pulp

Other hypernyms of sweetsop include custard apple.

sweetsop (noun)	custard apple tree (noun)
sweet pulpy tropical fruit with thick scaly rind and shiny black seeds	any of several tropical American trees bearing fruit with soft edible pulp
tropical American tree bearing sweet pulpy fruit with thick scaly rind and shiny black seeds