The word impracticality 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: 29
Highest Scoring Words With Friends™ Plays In The Letters impracticality
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Seven Letter Word Alert: (30 words)
acclaim, acrylic, airmail, airplay, aplitic, caltrap, campily, capital, cattail, cattily, ciliary, clarity, clipart, cryptic, mailcar, marital, martial, militar, militia, partial, patrial, playact, practic, primacy, pyritic, rattail, tacitly, tilapia, tipcart, typical