Oppressive
Part of speech: adjective
Definition: Burdensome or difficult to bear. Tyrannical or exercising unjust power. Weighing heavily on the spirit; intense, or overwhelming
Example sentence: Even in the 1950s, President Eisenhower was concerned about what he called a campaign of hatred of the U.S. in the Arab world, because of the perception on the Arab street that it supported harsh and oppressive regimes to take their oil.
Tyrannical
Part of speech: adjective
Definition: Of, or relating to tyranny or a tyrant.Despotic, oppressive or authoritarian.
Example sentence: The methods by which a trade union can alone act, are necessarily destructive; its organization is necessarily tyrannical.