S: (n) explosion, burst (the act of exploding or bursting) "the explosion of the firecrackers awoke the children"; "the burst of an atom bomb creates enormous radiation aloft"
S: (n) change (the action of changing something) "the change of government had no impact on the economy"; "his change on abortion cost him the election"
S: (n) action (something done (usually as opposed to something said)) "there were stories of murders and other unnatural actions"