The word advertently 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: 20
Highest Scoring Words With Friends™ Play In The Letters advertently
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Seven Letter Word Alert: (28 words)
alerted, altered, averted, deanery, delayer, deltate, dentate, enteral, entreat, eternal, layered, learned, lyrated, nettled, rattled, raveled, redealt, related, relayed, ternate, treadle, treated, valeted, veneral, ventral, veteran, yearend, yearned