WordNet (r) 3.0 (2006):

cloud seeder
    n 1: a person who seeds clouds [syn: seeder, cloud seeder]

Moby Thesaurus II by Grady Ward, 1.0:

30 Moby Thesaurus words for "cloud seeder":
   Dry Ice, aeronaut, aeroplaner, aeroplanist, air pilot, airplanist,
   artificial nucleation, astronaut, aviator, barnstormer, birdman,
   captain, cloud-seeding, commercial pilot, copilot, crop-duster,
   flier, instructor, jet jockey, licensed pilot, pilot, rain doctor,
   rainmaker, rainmaking, seeding, silver iodide, stunt flier,
   stunt man, test pilot, wingman