Democracy- A system of government elected through elected representatives.
Republic- A state in which supreme power is held by the people.
Democracy is a form of government in which all eligible citizens participate equally
It encompasses social, religious, cultural, ethnic and racial equality, justice, and liberty
Democracy contrasts with forms of government where power is either held by an individual, as in an absolute monarchy

A republic is a form of government in which power resides in the people,and the government is ruled by elected leaders run according to law
With no monarch, most modern republics use the title president for the head of state.