overthrow

(noun) the termination of a ruler or institution (especially by force).

(noun) the act of disturbing the mind or body. Synonyms: upset, derangement. Examples: "His carelessness could have caused an ecological upset." "She was unprepared for this sudden overthrow of their normal way of living."

(verb) cause the downfall of; of rulers. Synonyms: subvert, overturn, bring down. Examples: "The czar was overthrown." "Subvert the ruling class."

(verb) rule against. Synonyms: overrule, overturn, override, reverse. Example: "The republicans were overruled when the house voted on the bill."