They are both forms of government and no decisions can be made by the people.
there really is none the only similarity is that sometimes in a dictatorship you vote for the dictator and in a parlimentary democracy you vote for representatives
Oligarchy An oligarchist is someone who supports Oligarchy.
oligarchy dictatorship communist
Democracy
It is a Unitary presidential republic.
Simply put, power may be in your hands under an oligarchy, if you are in the reigning group.
Oligarchy (APEX)
oligarchy,tyranny,democracy,dictatorship
Both don't allow people to vote and a higher noble person rules the country.
The opposite of rule by the people would be a dictatorship, tyranny, or other form of absolute rule (over the people). An absolute monarchy could also qualify. In communism, the state would operate "for" the people, and would actually need elements of democracy to determine what was best for everyone. In practice, it usually consists of an open oligarchy by its executives (commissariat).
oligarchy Dictatorship communist
Direct Democracy, Tribal Rule, Absolute Monarchy, Dictatorship, Oligarchy, Constitutional Monarchy and Representative Democracy.