Signalled rhymes with:
signaled, signaled, signaled, annulled, arnold, channeled, donald, empaneled, flanneled, funneled, impaneled, macdonald, mcdonald, o'donald, odonald, paneled, reginald, reynold, ronald, signaled
Signalled sounds like:
schmoldt, schoenwald, seasonality, senility, shinault, signaled, simulate, simulated, smallwood, smelled, smelt, smiled, sunlit, sunlite