Shuttlecock is a game played with a feathered projectile, usually consisting of a cork base with feathers attached to it. The term shuttlecock is also used to refer to the projectile itself. The crossword solutions for the term shuttlecock are 'BIRD' (4 letters) and 'BIRDIE' (6 letters). Both terms refer to the feathered projectile used in the game, as the shape and design of the shuttlecock resembles a small BIRD.