The word outsailing 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 outsailing
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Seven Letter Word Alert: (26 words)
agonist, agoutis, aisling, anglist, intagli, lasting, liaison, listing, lousing, lusting, oligist, ousting, outgain, outings, outsail, outsang, sailing, salting, silting, slating, soiling, suiting, tailgun, tailing, tilings, toiling