The word impersonal 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: 18
Highest Scoring Words With Friends™ Plays In The Letters impersonal
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Seven Letter Word Alert: (62 words)
aileron, almoner, alpines, animose, anomers, enamors, epsilon, impaler, impales, impanel, implore, imposer, lempira, lipomas, loamier, loaners, mailers, manlier, marines, marlins, mineral, misplan, moaners, moraine, morales, nailers, normals, oarsmen, opaline, orleans, palmier, paroles, persona, plainer, planers, plasmin, plasmon, pleions, praline, prelims, primase, prismal, proline, promise, realism, reloans, remails, remains, renails, replans, repoman, romaine, ropeman, sampler, sealion, seminal, seminar, simpler, sirname, soapier, spaniel, spoiler