WordNet (r) 3.0 (2006):

hammer and sickle
    n 1: the emblem on the flag of the Soviet Union

Moby Thesaurus II by Grady Ward, 1.0:

50 Moby Thesaurus words for "hammer and sickle":
   armory, badge, badge of office, badges, baton, blazonry, brassard,
   button, cap and gown, chain, chain of office, class ring, cockade,
   collar, cross, decoration, dress, eagle, emblems, ensigns, fasces,
   figurehead, fleur-de-lis, heraldry, insignia, lapel pin, livery,
   mace, mantle, markings, medal, mortarboard, old school tie, pin,
   regalia, ring, rose, school ring, shamrock, sigillography,
   skull and crossbones, sphragistics, staff, swastika, tartan,
   thistle, tie, uniform, verge, wand