Tyrannid is a descriptive term used to refer to a cruel, oppressive, or tyrannical leader. Synonyms for this word could include despotic, autocratic, dictatorial, oppressive, domineering, bullying, or overbearing. These words describe a ruler who exercises their power with little regard for the well-being or freedom of those they rule over. Other synonyms for tyrannid could include authoritarian, tyrannical, or oppressive, which are all words that suggest a leader who rules with an iron fist and is often characterized by their lack of concern for the rights and freedoms of the people they govern. Regardless of the specific synonym chosen, all these options suggest a leader who is harsh and controlling, leaving little room for dissent.