The word pacifistically 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: 30
Highest Scoring Words With Friends™ Plays In The Letters pacifistically
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Seven Letter Word Alert: (29 words)
aplitic, calcify, capital, catcall, clastic, clitics, cyclist, facials, fallacy, falsity, fascial, fatally, flypast, illicit, illitic, italics, pacific, pitfall, plastic, playact, saltily, sciatic, silicic, spacial, spatial, spicily, tilapia, tipsily, typical