1) Aerofoil 2) Aircraft control 3) Airfoil 4) Control surface 5) Horizontal stabiliser 6) Horizontal stabilizer 7) Surface 
A tailplane, also known as horizontal stabilizer (or horizontal stabiliser), is a small lifting surface located on the tail (empennage) behind the main lifting surfaces of a fixed-wing aircraft as well as other non-fixed-wing aircraft such as helicopters and gyroplanes. Not all fixed-wing aircraft have tailplanes. Canards, tailless and flying wing...
The fixed horizontal tail surface
Usually synonymous with Stabilator (q.v.).
The fixed horizontal tail surface of an aeroplane.