The word shearwaters 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: 16
Highest Scoring Words With Friends™ Plays In The Letters shearwaters
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Seven Letter Word Alert: (46 words)
aerates, arrests, artware, erasers, hearers, hearses, heaters, hetaera, rashers, rashest, rasters, rehears, reheats, reseats, reshare, resters, reswear, retears, rethaws, rewater, searats, seastar, seaters, serrate, sharers, shearer, starers, swasher, swathes, swearer, sweater, tearers, teasers, teaware, trasher, trashes, washers, wasters, waterer, wearers, weather, whereas, whereat, wreathe, wreaths, wrester