shooter in WordNet English dictionary

1. a gambler who throws dice in the game of craps
   shooter  crap-shooter 
   
2. a professional killer who uses a gun
   gunman  gunslinger  hired gun  gun  gun for hire  triggerman  hit man  hitman  torpedo  shooter 
   
3. a large marble used for shooting in the game of marbles
   taw  shooter 
   
4. a person who shoots (usually with respect to their ability to shoot)
   "he is a crack shot"; "a poor shooter"
   shot  shooter 
   
5. (sports) a player who drives or kicks a ball at the goal (or a basketball player who shoots at the basket)
   shooter