The word steersman 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: 13
Highest Scoring Words With Friends™ Play In The Letters steersman
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Seven Letter Word Alert: (27 words)
artsmen, earnest, eastern, ensears, martens, masters, meanest, nearest, nesters, remates, renames, renests, reseats, resents, restems, reteams, sateens, seamers, seaters, senates, sensate, smarten, stamens, steamer, sterane, streams, teasers