The Collaborative International Dictionary of English v.0.48:

Ease \Ease\ ([=e]z), v. t. & i. [imp. & p. p. Eased ([=e]zd);
   p. pr. & vb. n. Easing.] [OE. esen, eisen, OF. aisier. See
   Ease, n.]
   1. To free from anything that pains, disquiets, or oppresses;
      to relieve from toil or care; to give rest, repose, or
      tranquillity to; -- often with of; as, to ease of pain; to
      ease the body or mind.
      [1913 Webster]

            Eased [from] the putting off
            These troublesome disguises which we wear. --Milton.
      [1913 Webster]

            Sing, and I 'll ease thy shoulders of thy load.
                                                  --Dryden.
      [1913 Webster]

   2. To render less painful or oppressive; to mitigate; to
      alleviate.
      [1913 Webster]

            My couch shall ease my complaint.     --Job vii. 13.
      [1913 Webster]

   3. To release from pressure or restraint; to move gently; to
      lift slightly; to shift a little; as, to ease a bar or nut
      in machinery.
      [1913 Webster]

   4. To entertain; to furnish with accommodations. [Obs.]
      --Chaucer.
      [1913 Webster]

   To ease off, To ease away (Naut.), to slacken a rope
      gradually.

   To ease a ship (Naut.), to put the helm hard, or regulate
      the sail, to prevent pitching when closehauled.

   To ease the helm (Naut.), to put the helm more nearly
      amidships, to lessen the effect on the ship, or the strain
      on the wheel rope. --Ham. Nav. Encyc.

   Syn: To relieve; disburden; quiet; calm; tranquilize;
        assuage; alleviate; allay; mitigate; appease; pacify.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

easing \easing\ n.
   1. a change for the better.

   Syn: moderation, relief.
        [WordNet 1.5]

   2. the act of reducing something unpleasant, such as pain.

   Syn: alleviation, relief.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

easing
    n 1: a change for the better [syn: easing, moderation,
         relief]
    2: the act of reducing something unpleasant (as pain or
       annoyance); "he asked the nurse for relief from the constant
       pain" [syn: easing, easement, alleviation, relief]

Moby Thesaurus II by Grady Ward, 1.0:

105 Moby Thesaurus words for "easing":
   abatement, abating, allaying, allayment, alleviating, alleviation,
   alleviative, analgesia, analgesic, anesthesia, anesthetic,
   anesthetizing, anodyne, appeasement, assuagement, assuaging,
   assuasive, balmy, balsamic, benumbing, blunting, calming,
   cathartic, chastening, clarification, cleansing, cushioning,
   dampening, damping, deadening, demulcent, demulsion, diminishing,
   diminishment, diminution, disburdening, disencumbering,
   disencumberment, dulcification, dulling, ease, easement, emollient,
   expediting, expedition, facilitation, falling-off, hastening,
   hushing, laxation, leniency, lenitive, lessening, letdown, letup,
   lightening, loosening, lulling, mellowing, mitigating, mitigation,
   mitigative, modulation, mollification, mollifying, numbing,
   pacification, padding, pain-killing, palliation, palliative,
   purgative, quickening, quietening, quieting, reducing, reduction,
   relaxation, relaxing, relief, relieving, remedial, remedy,
   remission, salving, simplification, simplifying, slackening,
   smoothing, softening, softening-up, soothing, speeding,
   streamlining, subduement, subduing, tempering, tranquilization,
   unballasting, unburdening, unfreighting, unlading, unloading,
   unsaddling, untaxing