Substances rhymes with:
distances, instances, distances, instances, sentences, alliances, ambulances, appearances, appliances, audience's, audiences, balances, condolences, conferences, confidence's, distances, disturbances, entrances, evidences, fragrances, grievances, indulgences, instances, performances, prominences, protuberances, provinces, resemblances, sciences, sentences, sequences
Substances sounds like:
scapegoating, sebastian's, sebastianis, subjecting, subsidence, subsiding, subsistence, substance, substituting, substitutions, subsystems, suffocating, suppositions, suspecting