The word brainwashings 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 brainwashings
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Seven Letter Word Alert: (33 words)
abasing, airbags, airings, anginas, arising, arshins, awnings, bargain, bashing, biasing, garnish, hangars, hissing, ingrain, raining, raising, raisins, rinsing, risings, sangria, sashing, sharing, shining, snaring, sringas, swinish, warning, wasabis, washing, washrag, whining, wirings, wishing