(n.) One who, or that which, drills.

Privatdocent Privatdozent Pullman Pullman car advise advocate amateur athlete archer athlete athletic coach baggage car ballplayer barge baseballer baseman batter battery blocking back boat bowman boxcar brief bus caboose car carriage cart catcher center chair car coacher coal car competitor confer consult with counsel covered waggon cram cram with facts crammer cricketer day coach defensive lineman diner dinghy dining car direct drawing room dray drill driller drillmaster end exercise ferry flat flatcar float footballer forerunner games-player gamester gondola groomer guard guide infielder instruct instructor jock jumper kibitz lighter lineman local luggage van mail car mail van meddle mentor motor coach offensive lineman omnibus outfield outfielder palace car parlor car passenger car pathfinder player poloist preparationist preparator prepare preparer prescribe prime private instructor professional athlete prompt propose pugilist quarterback racer raft railway car recommend reefer refrigerator car roomette school ship skater sled sledge sleeper smoker smoking car sport sportsman stockcar stuff with knowledge submit suggest tackle tailback tank teacher tender toxophilite trailblazer train trainer truck tutor tutorer van waggon wagon wheelbarrow wingback wrestler