The word adverbially 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: 23
Highest Scoring Words With Friends™ Plays In The Letters adverbially
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Seven Letter Word Alert: (28 words)
abrayed, airable, allayed, allayer, already, alveary, availed, bedrail, bilayer, brailed, braille, bravely, devilry, dialler, driveby, ideally, illbred, liberal, livable, rabidly, rallied, readily, reavail, rivaled, validly, velaria, vialled, virally