The word "tyrannicalness" refers to the quality of someone being tyrannical or having an absolute power that is brutally oppressive. There are several synonyms to express the same meaning such as despotic, dictatorial, autocratic, oppressive, domineering, imperious, overbearing, authoritarian, and high-handedness. These words describe someone who exercises power and control in an unfair, harsh, and cruel manner. Being tyrannical is often viewed negatively as it involves disregarding the rights, feelings, and opinions of others. The use of any of these synonyms can help to convey a strong message about a person or situation that exhibits such behavior to the audience.