transience

the state or quality of lasting only for a short time wary of the transience of popular enthusiasms, the writers of the U.S. Constitution made changing the document a long and difficult process Synonyms ephemerality, evanescence, fleetingness, fugitiveness, impermanency, momentariness, temporariness, impermanence, transiency, transitorinessRelated Words brevity, shortnessNear Antonyms continuance, continuation; longevityAntonyms endurance, permanence, permanency