The word unaccessible 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: 24
Highest Scoring Words With Friends™ Plays In The Letters unaccessible
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Seven Letter Word Alert: (56 words)
abscise, abseils, absence, accuses, baleens, beanies, because, buccans, buccina, buccins, bucinas, bucines, calcine, cancels, caseins, cauline, celcius, celsius, classic, clauses, cleanse, cubanes, cubical, cubicle, cubless, enables, enbuses, encases, enseals, euclase, icecube, iceless, incubee, inulase, lesbian, leucine, licence, license, nebulae, nebulas, nucleic, salines, scabies, scalene, science, seances, sensual, silanes, silence, sluices, subcase, unbales, unbless, unlaces, unseals, useable