Tendencies rhymes with:
dependencies, dependencies, redundancies, dependencies, presidencies, presidency's, redundancies, agencies, agencies', agency's, conservancy's, constituencies, contingencies, counterinsurgencies, currencies, currency's, deficiencies, delinquencies, dependencies, discrepancies, efficiencies, emergencies, exigencies, expectancies, frequencies, inefficiencies, insolvencies, insurgencies, malignancies, pregnancies, presidencies, presidency's, redundancies, regency's, transparencies, vacancies
Tendencies sounds like:
tainting, tandem's, taunting, tendency, tending, tendons, tenting, tomatino's, tontons