General terms:
* Abuse of power: This is the most common and general term, referring to any misuse of authority for personal gain or to harm others.
* Tyranny: This refers to cruel and oppressive use of power by a ruler or government.
* Oppression: This describes the act of unjustly subjecting people to harsh and unfair treatment.
* Despotism: This describes a form of government where a single person has absolute power and rules without any checks or balances.
More specific terms:
* Authoritarianism: This describes a form of government where power is concentrated in the hands of a single leader or small group, often with little or no accountability.
* Totalitarianism: This is a form of government where the state controls all aspects of life, including the economy, culture, and personal behavior.
* Nepotism: This refers to favoritism shown to family members or close friends, often at the expense of others.
* Corruption: This describes dishonest or fraudulent conduct by those in power, often involving bribery or other forms of self-enrichment.
The best word to use will depend on the specific context and the nature of the unjust use of power.