Synonyms for Due (same or very similar meaning)
WordNet sense 1 (considered likely or probable to happen or arrive):
expectedWordNet sense 2 (owed as a debt):
owingWordNet sense 3 (subject to or requiring payment especially as specified):
payableWordNet sense 4 (owed and payable immediately or on demand):
owedFrom the ODE community, based on WordNetadd/edit