shuttle

shuttle (http://definr.com/shuttle)

     n 1: badminton equipment consisting of a ball of cork or rubber
          with a crown of feathers [syn: shuttlecock, bird, birdie]
     2: public transport that consists of a bus or train or airplane
        that plies back and forth between two points
     3: bobbin that passes the weft thread between the warp threads
     v : travel back and forth between two points