The word tantaliser 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: 12
Highest Scoring Words With Friends™ Play In The Letters tantaliser
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Seven Letter Word Alert: (64 words)
aerials, antlers, antsier, arsenal, artiest, artisan, atresia, attains, attires, elastin, entails, instate, iratest, lariats, latents, latites, latrine, litters, nailers, nailset, nastier, natters, nattier, nitrate, ratline, rattail, rattles, realist, reliant, renails, rentals, reslant, restain, retails, retains, retilts, retinal, retinas, retints, salient, saltate, saltern, saltier, satiate, sealant, slatier, slitter, stainer, starlet, starlit, startle, sternal, stilter, straint, striate, talents, tartans, tastier, tertial, tilters, tinters, transit, trenail, tsarina