Wordnet 3.0
NOUN (1)
1. 
 a movie that apparently takes place at a slower than normal speed; 
 achieved by taking the film at a faster rate; 
WordNet (r) 3.0 (2006):
slow motion
    n 1: a movie that apparently takes place at a slower than normal
         speed; achieved by taking the film at a faster rate
Moby Thesaurus II by Grady Ward, 1.0:
26 Moby Thesaurus words for "slow motion":
   andante, claudication, crawl, creep, dead march, dogtrot, footpace,
   funeral march, hobble, jog, jog trot, leisurely gait, limp,
   lumbering pace, mincing steps, plod, rack, saunter, shamble,
   shuffle, slouch, slow march, stroll, trudge, waddle, walk