The word windbreaks 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: 22
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (33 words)
abiders, airbeds, bankers, bawdier, binders, brained, braised, branked, breakin, brisked, brisken, darkens, debarks, disrank, inbreds, indraws, inwards, rebinds, rewinds, sandier, sardine, seabird, sidebar, skiwear, snakier, snarked, swanked, swanker, wanders, wardens, webinar, winders, winkers