Senility rhymes with:
ability, acceptability, adaptability, admissibility, affordability, agility, amiability, applicability, availability, capability, civility, combinability, compatibility, comprehensibility, debility, deductibility, docility, ductility, electability, feasibility, fertility, flexibility, fragility, futility, hostility, inaccessibility, invisibility, irresponsibility, irritability, legibility, malleability, mobility, nobility, overwhelmability, palatability, possibility, probability, rehability, reliability, responsibility, susceptibility, utility, versatility, viability, virility, volatility
Senility sounds like:
schmoldt, schoenwald, seasonality, shinault, signaled, signalled, simulate, simulated, smallwood, smelled, smelt, smiled, sunlit, sunlite