The main difference between Autocracy and Monarch is that the Autocracy is a system of government and Monarch is a person at the head of a monarchy
An autocracy is a system of government in which supreme power (social and political) is concentrated in the hands of one person, whose decisions are subject to neither external legal restraints nor regularized mechanisms of popular control (except perhaps for the implicit threat of a coup d’état or mass insurrection). Absolute monarchy (such as Saudi Arabia, the United Arab Emirates, Oman, Brunei and Swaziland) and dictatorships (such as North Korea) are the main modern-day forms of autocracy.
In earlier times, the term “autocrat” was coined as a favorable feature of the ruler, having some connection to the concept of “lack of conflicts of interests” as well as an indication of grandeur and power. The Russian Tsar for example was styled, “Autocrat of all the Russias”, as late as the early 20th century.
A monarch is a sovereign head of state in a monarchy. A monarch may exercise the highest authority and power in the state, or others may wield that power on behalf of the monarch. Usually a monarch either personally inherits the lawful right to exercise the state’s sovereign rights (often referred to as the throne or the crown) or is selected by an established process from a family or cohort eligible to provide the nation’s monarch. Alternatively, an individual may become monarch by conquest, acclamation or a combination of means. A monarch usually reigns for life or until abdication.
If a young child is crowned the monarch, a regent is often appointed to govern until the monarch reaches the requisite adult age to rule. Monarchs’ actual powers vary from one monarchy to another and in different eras; on one extreme, they may be autocrats (absolute monarchy) wielding genuine sovereignty; on the other they may be ceremonial heads of state who exercise little or no direct power or only reserve powers, with actual authority vested in a parliament or other body (constitutional monarchy).
A monarch can reign in multiple monarchies simultaneously. For example, the monarchy of Canada and the monarchy of the United Kingdom are separate states, but they share the same monarch through personal union.
A form of government in which unlimited power is held by a single individual.
An instance of this government.
The ruler of an absolute monarchy or the head of state of a constitutional monarchy.
The monarch butterfly, Danaus plexippus, and others of genus Danaus, found primarily in North America, so called because of the designs on its wings.
A police officer.
A points or tines on its antlers.
The chief or best thing of its kind.