speeder

/S P IY1 D ER0/
noun
  1. 1

    One who speeds: one who exceeds the maximum legal speed limit.

  2. 2

    (rail transport) A motorized railroad track crew cart.

  3. 3

    (industrial relations) A fast worker selected by a company to exemplify the rate of work generally expected; a pacesetter.

  4. 4

    (dated) A machine for drawing and twisting slivers to form rovings, in spinning.