jailor

from WordNet (r) 3.0 (2006)

jailor
    n 1: someone who guards prisoners [syn: {prison guard},
         {jailer}, {jailor}, {gaoler}, {screw}, {turnkey}]

from The Collaborative International Dictionary of English v.0.48

Jailer \Jail"er\, n. [OE. jailer, gailer, OF. geolier, F.
   ge[^o]lier. See {Jail}.]
   The keeper of a jail or prison. [Written also {jailor},
   {gaoler}.]