S: (n) upset, derangement, overthrow (the act of disturbing the mind or body) "his carelessness could have caused an ecological upset"; "she was unprepared for this sudden overthrow of their normal way of living"
Verb
S: (v) overthrow, subvert, overturn, bring down (cause the downfall of; of rulers) "The Czar was overthrown"; "subvert the ruling class"