The Collaborative International Dictionary of English v.0.48:

Conciliatory \Con*cil"i*a*to*ry\ (?; 106), a.
   Tending to conciliate; pacific; mollifying; propitiating.
   [1913 Webster]

         The only alternative, therefore, was to have recourse
         to the conciliatory policy.              --Prescott.
   [1913 Webster]

WordNet (r) 3.0 (2006):

conciliatory
    adj 1: making or willing to make concessions; "loneliness tore
           through him...whenever he thought of...even the
           compromising Louis du Tillet" [syn: compromising,
           conciliatory, flexible] [ant: inflexible, sturdy,
           uncompromising]
    2: intended to placate; "spoke in a conciliating tone"; "a
       conciliatory visit" [syn: conciliatory, conciliative]
       [ant: antagonistic]

Moby Thesaurus II by Grady Ward, 1.0:

41 Moby Thesaurus words for "conciliatory":
   appeasing, benevolent, civilian, dovish, forbearing, forgiving,
   generous, irenic, kind, long-suffering, longanimous, magnanimous,
   mollifying, nonaggressive, noncombatant, nonmilitant, nonviolent,
   pacific, pacificatory, pacifist, pacifistic, pacifying, patient,
   peace-loving, peaceable, placable, placative, placatory,
   propitiative, propitiatory, reconciliatory, soothing, sparing,
   tolerant, unbellicose, uncontentious, unhostile, unmilitant,
   unmilitary, unresentful, unrevengeful