(n.) Impermanence; shortness in duration\.

adaptability adjustability alterability brevity briefness changeability changeableness changefulness compactness compendiousness conciseness curtness death rate death toll flexibility fluidity impermanence instantaneousness littleness lowness malleability mobility modifiability mortality mortalness movability mutability nonuniformity permutability plasticity resilience rubberiness short time shortness succinctness summariness suppleness transitoriness