thinkable

from WordNet (r) 3.0 (2006)

thinkable
    adj 1: capable of being conceived or imagined or considered
           [ant: {unthinkable}]

from The Collaborative International Dictionary of English v.0.48

Thinkable \Think"a*ble\, a.
   Capable of being thought or conceived; cogitable. --Sir W.
   Hamilton.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

18 Moby Thesaurus words for "thinkable":
      believable, cogitable, conceivable, conceivably possible,
      contingent, credible, fanciable, feasible, humanly possible,
      imaginable, likely, plausible, possible, potential, probable,
      reasonable, supposable, tenable

[email protected]