"overthrow" in the noun sense
1. overthrow
the termination of a ruler or institution (especially by force)
2. 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"
"overthrow" in the verb sense
1. overthrow, subvert, overturn, bring down
cause the downfall of of rulers
"The Czar was overthrown"
"subvert the ruling class"
2. overrule, overturn, override, overthrow, reverse
rule against
"The Republicans were overruled when the House voted on the bill"
Source: WordNet® (An amazing lexical database of English)
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