Fidelities rhymes with:
fidelity's, fidelity's, fidelity's, fidelity's, abilities, abnormalities, brutalities, capabilities, commonalities, disabilities, facilities, fatalities, fidelity's, formalities, generalities, hostilities, liabilities, modalities, possibilities, probabilities, qualities, realities, responsibilities, technicalities, tonalities, utilities, utilities', utility's
Fidelities sounds like:
fatalities, feedlots, fidelity's, footholds