The word wollastonites 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 wollastonites
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Seven Letter Word Alert: (80 words)
altoist, elastin, elation, enlists, entails, entwist, illness, insoles, install, instate, isolate, latents, latites, lawless, leantos, leasows, lentils, lesions, lintels, lioness, lionets, listens, loonies, loosens, loosest, lotions, lowness, nailset, nosiest, notists, oleosin, oolites, osteons, otolite, owliest, salient, salines, sallows, saloons, sealion, seitans, sestina, silanes, silents, slowest, soloist, soonest, stalest, stanols, statins, station, stetson, stollen, stoolie, swollen, talents, tallest, tallies, tallows, taoists, tinsels, toenail, toilets, tonsils, toolset, toonies, tootles, tootsie, towline, twinset, twonies, twoonie, wallets, wattles, winless, witless, witness, woolens, woolies, woollen