The word painkillers 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: 21
Highest Scoring Words With Friends™ Play In The Letters painkillers
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Seven Letter Word Alert: (33 words)
airlike, airline, alpines, aspirin, inspire, killers, lankier, linkers, nailers, pillars, pinkers, pinkier, pinkies, plainer, planers, plinker, praline, rallies, relinks, renails, replans, reskill, silkier, sillier, sinlike, snakier, spaller, spaniel, spanker, sparkle, spikier, spiller, spinier