The word conciliative is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 24
Highest Scoring Words With Friends™ Play In The Letters conciliative
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Seven Letter Word Alert: (34 words)
aclinic, aconite, actinic, aloetic, avionic, cacolet, calcine, calcite, ciliate, coalite, cocaine, coeliac, colicin, concave, conceal, conceit, conical, convect, convict, elation, ilvaite, initial, invoice, laconic, lactone, lection, oceanic, olivine, toenail, vaccine, violate, violent, vocalic, voltaic