The word impracticably 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: 31
Highest Scoring Words With Friends™ Plays In The Letters impracticably
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Seven Letter Word Alert: (31 words)
ability, acclaim, acrylic, airmail, airplay, albitic, amiably, aplitic, biliary, caltrap, cambial, cambric, campily, capably, capital, ciliary, clarity, clipart, cryptic, mailcar, marital, martial, militar, partial, patrial, playact, practic, primacy, pyritic, tilapia, typical