Tyrant

18 clues
Bully
Despot
Dictator
Autocrat
Oppressor
Taskmaster
Tough boss
Coup target
Harsh ruler
Cruel master
Absolute ruler
Cruel dictator
Ruthless ruler
Caligula, e.g.
Oppressive boss
Oppressive ruler
Iron-fisted ruler
Uncompromising sort
Similar answers:
Aanti
Aberrant
Aberrantly
Abeyant
Abicyclecant
Abradant
Absonant
Abundant
Abundantly
Abundantlyclear
Acanthus
Acanthuses
Accountant
Accountants
Accountantshope
Actagainstants
Actarrogantly
Adamandtheants
Adamant
Adamantcolonies