The word shipowners 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: 19
Highest Scoring Words With Friends™ Play In The Letters shipowners
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Seven Letter Word Alert: (32 words)
heroins, hipness, hosiers, inshore, iphones, persons, phonier, phonies, preshow, prisons, prowess, reships, reshown, reshows, respins, rosehip, seniors, shiners, showers, showier, shrines, siphons, snipers, snowier, spinose, swipers, swisher, whiners, whisper, wishers, worsens, worship