The Collaborative International Dictionary of English v.0.48:

Moonshiner \Moon"shin`er\, n.
   A person engaged in illicit distilling; -- so called because
   the work is largely done at night. [Cant, U.S.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

moonshiner
    n 1: someone who makes or sells illegal liquor [syn:
         bootlegger, moonshiner]

Moby Thesaurus II by Grady Ward, 1.0:

24 Moby Thesaurus words for "moonshiner":
   Mafioso, barkeep, barkeeper, barmaid, barman, bartender,
   black marketeer, bootlegger, brewer, brewmaster, dealer, distiller,
   drug pusher, gray marketeer, liquor dealer, liquor store owner,
   mixologist, publican, pusher, racketeer, tapster, tapstress,
   vintner, wine merchant