Synonyms for Soursop (same or very similar meaning)
WordNet sense 1 (small tropical American tree bearing large succulent slightly acid fruit):
Annona muricata, prickly custard apple, soursop tree
WordNet sense 2 (large spiny tropical fruit with tart pulp related to custard apples):
guanabana
From the ODE community, based on WordNet
add/edit