tyrant
A cruel and oppressive ruler who holds absolute power. / A person who exercises power in a cruel, arbitrary, or controlling way within a small group or family.
[C] Countable
pl: tyrants
This word carries a heavy weight of oppression and lack of empathy. It describes a specific type of power dynamic where the ruler does not just lead, but dominates through fear and unpredictability. There is a strong association with the abuse of authority and the erasure of individual autonomy.
While a dictator is defined by the political structure of their power, a tyrant is defined by the malicious way they exercise that power. In modern casual usage, it is often applied hyperbolically to parents or managers who are overly strict or demanding, though it retains its sinister edge in historical or political contexts.
Used to count individual people who hold oppressive power, such as identifying three different tyrants in a history book.