The word crossbencher 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: 24
Highest Scoring Words With Friends™ Play In The Letters crossbencher
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Seven Letter Word Alert: (36 words)
benches, boreens, censers, censors, coercer, coerces, coherer, coheres, conches, corners, creches, crosser, echoers, encores, enrober, enrobes, herbose, necrose, obscene, rebores, rechose, recross, rehones, rescore, reshoes, reshore, resorbs, sconces, scorers, scorner, screech, screens, secerns, snorers, soberer, soccers