The Collaborative International Dictionary of English v.0.48:

Pickle \Pic"kle\, v. t. [imp. & p. p. Pickled; p. pr. & vb. n.
   Pickling.]
   1. To preserve or season in pickle; to treat with some kind
      of pickle; as, to pickle herrings or cucumbers.
      [1913 Webster]

   2. To give an antique appearance to; -- said of copies or
      imitations of paintings by the old masters.
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

29 Moby Thesaurus words for "pickling":
   anhydration, blast-freezing, bottling, brining, canning, corning,
   curing, dehydration, desiccation, dry-curing, drying, embalming,
   evaporation, freeze-drying, freezing, fuming, irradiation, jerking,
   marination, mummification, potting, quick-freezing, refrigeration,
   salting, seasoning, smoking, stuffing, taxidermy, tinning