The word inappreciable 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: 27
Highest Scoring Words With Friends™ Plays In The Letters inappreciable
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Seven Letter Word Alert: (45 words)
airable, airline, airpipe, albinic, apparel, applier, balance, banaler, biplane, caliber, calibre, caliper, capable, carbeen, carbene, carbine, carinae, carinal, clapper, cleaner, clipper, cranial, crappie, cripple, enabler, epicarp, icepail, inplace, lacinia, lippier, nippier, panicle, parable, pelican, plainer, plebian, praline, preplan, priapic, reclean, recline, repanel, replace, replane, replica