The Collaborative International Dictionary of English v.0.48:

jailing \jailing\ n.
   The act or process of putting someone in prison or in jail as
   a lawful punishment.

   Syn: imprisonment.
        [WordNet 1.5] Jain

Moby Thesaurus II by Grady Ward, 1.0:

30 Moby Thesaurus words for "jailing":
   captivity, close arrest, confinement, detention, dismemberment,
   durance, durance vile, duress, estrapade, galleys, hard labor,
   house arrest, immuration, immurement, impalement, imprisonment,
   incarceration, internment, keelhauling, martyrdom, penal servitude,
   picketing, railriding, rock pile, strappado, tar-and-feathering,
   term of imprisonment, the gantlet, torment, torture