WordNet (r) 3.0 (2006):

forest god
    n 1: one of a class of woodland deities; attendant on Bacchus;
         identified with Roman fauns [syn: satyr, forest god]

Moby Thesaurus II by Grady Ward, 1.0:

36 Moby Thesaurus words for "forest god":
   Cailleac, Ceres, Cora, Demeter, Dionysos, Dionysus, Faunus, Flora,
   Frey, Gaea, Gaia, Kore, Pan, Persephassa, Persephone, Pomona,
   Priapus, Proserpina, Proserpine, Triptolemos, Triptolemus, Vidar,
   Vitharr, corn god, corn spirit, faun, fertility god, field spirit,
   panisc, panisca, paniscus, satyr, silenus, sylvan deity,
   the goat god, vegetation spirit