The word shearwater 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: 15
Highest Scoring Words With Friends™ Play In The Letters shearwater
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Seven Letter Word Alert: (27 words)
aerates, artware, hearers, heaters, hetaera, rehears, reheats, reshare, reswear, retears, rethaws, rewater, serrate, shearer, swearer, sweater, tearers, teaware, trasher, waterer, wearers, weather, whereas, whereat, wreathe, wreaths, wrester