The word nitpickers 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 nitpickers
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Seven Letter Word Alert: (43 words)
cistern, citrine, cretins, crispen, inciter, incites, inkiest, inspect, inspire, irenics, kinesic, kinetic, nitpick, pectins, pickers, pickets, pickier, picrite, pincers, pinkers, pinkest, pinkier, pinkies, pitiers, princes, pterins, reknits, restick, rickets, sericin, skeptic, snicker, spicier, spikier, spinier, sticker, stinker, tickers, tiepins, tinkers, tipsier, triceps, trickie