Wiktionary
builddown
n. A systematic, gradual reduction in the number of something (especially nuclear weapons), normally by destroying more than are built
Usage examples of "builddown".
It was too deep, too terrifying, to be considered now on a hot evening in summer, the time growing late, the sun going from the sky, the aimless dense crowds of the city moving out under the goggle gaze and as-yet silent gun-mouths of the police half eager and half fearat the possibility of tonight climaxing in riots and rockets from the sky which brought sniper-riddled builddown in flames.