THESAURUS
Jailer
advance guard, armed guard, bank guard, bull, coast guard, commandant, cordon, cordon sanitaire, custodian, gaoler, garrison, goalie, goalkeeper, goaltender, governor, guard, guarder, guardian, guardsman, inlying picket, keeper, outguard, outpost, penologist, picket, principal keeper, prison guard, rear guard, screw, security guard, train guard, turnkey, van, vanguard, warden, warder
ROGET THESAURUS
Jailer
Keeper
N
keeper, custodian, custos, ranger, warder, jailer, gaoler, turnkey, castellan, guard, watchdog, watchman, Charley, chokidar, durwan, hayward, sentry, sentinel, watch and ward, concierge, coast guard, guarda costa, game keeper, escort, bodyguard, protector, governor, duenna, guardian, governess, nurse, nanny, babysitter, catsitter, dogsitter, bonne, ayah.
Scourge
N
scourge, rod, cane, stick, ratan, rattan, birch, birch rod, azote, blacksnake, bullwhack, chicote, kurbash, quirt, rawhide, sjambok, rod in pickle, switch, ferule, cudgel, truncheon, whip, bullwhip, lash, strap, thong, cowhide, knout, cat, cat o'nine tails, rope's end, pillory, stocks, whipping post, cucking stool, ducking stool, brank, trebuchet, trebuket, triangle, wooden horse, iron maiden, thumbscrew, boot, rack, wheel, iron heel, chinese water torture, treadmill, crank, galleys, scaffold, block, ax, guillotine, stake, cross, gallows, gibbet, tree, drop, noose, rope, halter, bowstring, death chair, electric chair, gas chamber, lethal injection, firing squad, mecate, house of correction, goaler, jailer, executioner, electrocutioner, lyncher, hangman, headsman, Jack Ketch.