1) Absolutism 2) Autarchy 3) Authoritarianism 4) Autocracy 5) Caesarism 6) Despotism 7) Dictatorship 8) Government by only one person 9) One-man rule 10) Shogunate 11) Stalinism 12) Totalitarianism 13) Tyranny 1) Authoritarianism 2) Caesarism 3) Dictatorship 4) Shogunate 5) Stalinism 6) Totalitarianism 7) Tyranny 
government by one individual
• (n.) Government by a single person; undivided rule.
(from the article `political system`) While royal rule, as legitimized by blood descent, had almost vanished as an effective principle of government in the modern world, monocracy—a term ...
Mo·noc'ra·cy noun [ Mono- + -cracy , as in democracy .] Government by a single person; undivided rule. Sydney Smith. 
monocracy, monocratic Government by a single person; autocracy.
government by only one person; autocracy.