lastingness, durability, enduringness, strength

permanence by virtue of the power to resist stress or force; "they advertised the durability of their products"

• tensile strength — the strength of material expressed as the greatest longitudinal stress it can bear without tearing apart
• indestructibility — the strength to resist destruction
• continuity, persistence — the property of a continuous and connected period of time
• changelessness — the property of remaining unchanged
• everlastingness — the property of lasting forever

• permanence, permanency — the property of being able to exist for an indefinite duration