The word weatherglass 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: 20
Highest Scoring Words With Friends™ Plays In The Letters weatherglass
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Seven Letter Word Alert: (74 words)
aerates, ageless, artless, atlases, aweless, eaglets, earless, eartags, elaters, gashers, gathers, gearset, gelates, greases, haglets, halters, hatless, healers, hearses, heaters, hetaera, laagers, largess, largest, lashers, lathers, leasers, leashes, leather, legates, rashest, realest, reheats, relates, resales, reseals, reseats, restage, rethaws, sealers, searats, seastar, seaters, shelter, slasher, slaters, slather, stagers, stalags, stealer, swasher, swathes, sweater, swelter, tarsals, tealess, teargas, teasels, teasers, teaware, trashes, warless, washers, washrag, wastage, wasters, weasels, weather, whalers, whereas, whereat, wreathe, wreaths, wrestle