The word overcoating 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: 21
Highest Scoring Words With Friends™ Play In The Letters overcoating
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Seven Letter Word Alert: (40 words)
aconite, activer, carting, cartoon, carving, carvone, catogen, certain, coating, cognate, coinage, convert, coreign, coronet, crating, craving, enactor, erotica, evictor, granite, ingrate, ironage, octagon, orating, oration, oregano, organic, otarine, ovation, overact, reaving, rooting, tangier, tearing, tracing, vearing, vertigo, vetoing, vinegar, vintage