soursop vs custard apple tree

soursop and custard apple tree both are nouns.

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

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

soursop: small tropical American tree bearing large succulent slightly acid fruit
custard apple tree: any of several tropical American trees bearing fruit with soft edible pulp

Other hypernyms of soursop include custard apple.

soursop (noun)	custard apple tree (noun)
large spiny tropical fruit with tart pulp related to custard apples	any of several tropical American trees bearing fruit with soft edible pulp
small tropical American tree bearing large succulent slightly acid fruit