The Collaborative International Dictionary of English v.0.48:

pacifist \pacifist\ pacifistic \pacifistic\adj.
   Adhering to pacifism; opposed to war; -- of people.
   [WordNet 1.5]

WordNet (r) 3.0 (2006):

pacifistic
    adj 1: opposed to war [syn: pacifist(a), pacifistic,
           dovish]

Moby Thesaurus II by Grady Ward, 1.0:

29 Moby Thesaurus words for "pacifistic":
   bland, civilian, conciliatory, dovish, gentle, irenic, judicious,
   mild, mild as milk, moderate, nonaggressive, noncombatant,
   nonmilitant, nonviolent, pacific, pacifist, peace-loving,
   peaceable, peaceful, prudent, sober, soft, tame, temperate,
   unbellicose, uncontentious, unhostile, unmilitant, unmilitary