Noun
permanence -
the property of being able to exist for an indefinite duration
permanency
impermanence ,
impermanency the property of not existing for indefinitely long durations
permanent ,
lasting continuing or enduring without marked change in status or condition or place; "permanent secretary to the president" ; "permanent address" ; "literature of permanent value"
impermanent ,
temporary existing or enduring for a limited time only
duration ,
length continuance in time; "the ceremony was of short duration" ; "he complained about the length of time required"
perpetuity ,
sempiternity the property of being perpetual (seemingly ceaseless)
durability ,
enduringness ,
lastingness ,
strength permanence by virtue of the power to resist stress or force; "they advertised the durability of their products"
imperishability ,
imperishableness ,
imperishingness the property of being resistant to decay; "he advertised the imperishability of the product"
perdurability the property of being extremely durable
