WordNet (r) 3.0 (2006):

take it easy
    v 1: settle into a comfortable sitting position [syn: sit
         back, take it easy]

Moby Thesaurus II by Grady Ward, 1.0:

41 Moby Thesaurus words for "take it easy":
   be careful, be cautious, bed, bed down, calm down, coast,
   collect oneself, compose oneself, cool it, cool off, couch,
   curl up, drift, get organized, go easy, go on tiptoe, go to bed,
   go to rest, lie down, loll, lounge, make haste slowly,
   make light of, make little of, not sweat it, pussyfoot, recline,
   relax, repose, rest, settle to rest, simmer down, snug down,
   sober down, sprawl, take life easy, think nothing of, think twice,
   tiptoe, unwind, walk on eggshells