The word stabiliser 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: 14
Highest Scoring Words With Friends™ Play In The Letters stabiliser
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Seven Letter Word Alert: (40 words)
abseils, airiest, airless, albites, alibies, artless, astilbe, baiters, barites, basters, bitsier, blaster, blister, braises, braless, breasts, bristle, irisate, liaises, libates, realist, rebaits, reblast, relists, resails, retails, ribless, riblets, risible, sailers, saltier, satires, serials, siltier, slaters, slatier, stabler, stables, triable, tribals