Protuberances rhymes with:
conferences, alliances, ambulances, appearances, appliances, audience's, audiences, balances, condolences, conferences, confidence's, distances, disturbances, entrances, evidences, fragrances, grievances, indulgences, instances, performances, prominences, provinces, resemblances, sciences, sentences, sequences, substances
Protuberances sounds like:
port-au-prince, port_au_prince, protuberance