Tyrannical :: Tyrannical (a.) Of or pertaining to a tyrant; suiting a tyrant; unjustly severe in government; absolute; imperious; despotic; cruel; arbitrary; as, a tyrannical prince; a tyrannical master; tyrannical government..
Tyrannicidal :: Tyrannicidal (a.) Of or pertaining to tyrannicide, or the murder of a tyrant..
Tyrannicide :: Tyrannicide (n.) The act of killing a tyrant.