The constitution fixes the problem of the articles of confederation by providing for checks and balances and separation of powers.
The separation of powers consists in the assignment of government functions to different bodies. These bodies are classified into Legislative, Executive and Judiciary.
Republic opposes tyrannical, despotic, autocratic and absolutist forms of government. In this sense, at first, the monarchy in the weak sense is not opposed to the republic in the strong sense. Republicanism is a theory about the strong sense of the republic.
