The word warehousers 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: 17
Highest Scoring Words With Friends™ Play In The Letters warehousers
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Seven Letter Word Alert: (30 words)
arouser, arouses, erasers, erasure, harrows, hearers, hearses, hoarser, rashers, rearose, rehears, rehouse, reshare, reshoes, reshore, reshows, reswear, reswore, rushers, sharers, shearer, showers, soarers, swasher, swearer, ureases, usherer, washers, wearers, whereas