The word advertorial 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: 17
Highest Scoring Words With Friends™ Plays In The Letters advertorial
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Seven Letter Word Alert: (32 words)
aerator, airdate, areolar, arrival, arrived, availed, averral, aviated, aviator, avoider, delator, dilater, dilator, lardier, leotard, overlit, overrid, radiate, realtor, reavail, retrial, rivaled, tardier, tarried, tiaraed, trailed, trailer, travail, variate, variola, velaria, violate