lifer

from WordNet (r) 3.0 (2006)

lifer
    n 1: a prisoner serving a term of life imprisonment

from Moby Thesaurus II by Grady Ward, 1.0

19 Moby Thesaurus words for "lifer":
      POW, cageling, captive, chain gang, con, convict, detenu,
      ex-convict, gaolbird, internee, jailbird, parolee,
      political prisoner, prisoner, prisoner of war, stir bird,
      ticket-of-leave man, ticket-of-leaver, trusty