1) Blighter 2) Cuss 3) Gadfly 4) Harasser 5) Oppressor 6) Persecutor 7) Pest 8) Pesterer 9) Tantaliser 10) Tantalizer 11) Tormentor 1) Bully 2) Intimidator 3) Oppressor 4) Persecutor 5) Someone who torments 6) Tormentor 7) Tough 8) Tyrant 
• (n.) One who, or that which, torments; a tormentor. • (n.) An executioner.
Tor·ment'er noun 1. One who, or that which, torments; a tormentor. 2. An executioner. [ Obsolete] Chaucer. 
[n] - a flat at each side of the stage to prevent the audience from seeing into the wings
tormentor noun a flat at each side of the stage to prevent the audience from seeing into the wings