The Collaborative International Dictionary of English v.0.48:

Indictable \In*dict"a*ble\, a.
   Capable of being, or liable to be, indicted; subject to
   indictment; as, an indictable offender or offense.
   [1913 Webster]

WordNet (r) 3.0 (2006):

indictable
    adj 1: liable to be accused, or cause for such liability; "the
           suspect was chargeable"; "an indictable offense" [syn:
           chargeable, indictable]

Moby Thesaurus II by Grady Ward, 1.0:

22 Moby Thesaurus words for "indictable":
   accusable, arraignable, at fault, blamable, blameworthy,
   censurable, chargeable, criminal, culpable, faulty, guilty,
   impeachable, implicated, imputable, inculpated, involved,
   open to criticism, peccant, reprehensible, reproachable,
   reprovable, to blame