The word avouchments 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: 25
Highest Scoring Words With Friends™ Play In The Letters avouchments
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Seven Letter Word Alert: (28 words)
acumens, amounts, anthems, cashout, chasten, chaunts, consume, costume, housane, matches, mucosae, munches, muscone, notches, nutcase, octanes, octaves, outmans, sanctum, staunch, stomach, toucans, touches, unmatch, unmates, unteach, vacuome, vouches