Synonyms for Maintenance

Staying Power
constancy continuance continuation continuity endurance	extension lengthening maintenance perpetuation perseverance	persistence progress progression prolongation protraction	pursuance repetition staying power sustenance way

Tenacity
holding inhibition keeping	maintenance prehension preservation	repression retention suppression	tenacity

Stability
age antiquity constancy durability duration endurance	equilibrium equipoise hardening immobility inveteracy longevity	maintenance permanence perpetuity persistence quiescence rigidity	solidity stability standing stasis survival torpor