The word barrelhouse 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: 18
Highest Scoring Words With Friends™ Play In The Letters barrelhouse
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Seven Letter Word Alert: (39 words)
arbours, areoles, arouser, aureole, barrels, bearers, blusher, brasher, brusher, burlers, earlobe, erasure, harbors, harbour, haulers, healers, hearers, herbals, herbose, herbous, hoarser, hurlers, laborer, labours, realers, rearose, rebales, rebores, rebrush, rehears, rehouse, reshare, reshore, rubeola, shearer, soberer, surreal, useable, usherer