Triborough rhymes with:
attenborough, attleboro, crowborough, edinboro, edinburgh, farnborough, foxboro, foxborough, gainsboro, goldsborough, hillsboro, hillsborough, marlboro, marlborough, owensboro, peterborough, pittsboro, rosborough, rossborough, waynesboro, westboro, westborough, wilkesboro, yarboro, yarbrough
Triborough sounds like:
trappers, travers, traverse, traverso, trippers, trooper's, troopers, troopers'