Since you didn't say which overthrow you're talking about, we can't really answer the question, can we? Most overthrows are caused when the people have had enough mistreatment.
cause he wanted to overthrow spains king
The coup was meant to overthrow the government. The overthrow attempt did not work.
No, it is illegal and unethical to overthrow a government.
The infinitive verb "to overthrow" can be a noun, adjective, or adverb. (e.g. They mounted an attack to overthrow the government.)
May Overthrow happened in 1903.
The italians didn't overthrow him...he was assassinated
External motivation, Social pressure, and self motivation.
Coup.
No, it is not an adjective. Overthrow is a verb. The past participle, "overthrown" can be an adjective.
That overthrow was called the February Revolution.
In Greek mythology, the Titans tried to overthrow Zeus.
Another word for overthrow is defeat. Also the word destroy is another example. You could use the word seize as a synonym of the word overthrow.