The Collaborative International Dictionary of English v.0.48:

jailed \jailed\ adj.
   placed in a prison; -- of people.

   Syn: captive, confined, imprisoned.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

jailed
    adj 1: being in captivity [syn: captive, confined,
           imprisoned, jailed]

Moby Thesaurus II by Grady Ward, 1.0:

41 Moby Thesaurus words for "jailed":
   barred, behind bars, beleaguered, beset, besieged, blockaded,
   bound, cabined, caged, cloistered, closed-in, confined, cooped,
   cordoned, cordoned off, corralled, cramped, cribbed, enclosed,
   fenced, hedged, hemmed, immured, imprisoned, in captivity,
   in durance vile, in prison, in stir, incarcerated, leaguered,
   locked up, mewed, paled, penned, pent-up, quarantined, railed,
   restrained, shut-in, walled, walled-in