The word mesotheliomas 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 mesotheliomas
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Seven Letter Word Alert: (52 words)
aimless, ashiest, atheise, atheism, atomise, atomism, easiest, halites, hamlets, hatless, helmets, hessite, holiest, homiest, hostels, hostile, isohels, isolate, leashes, loathes, loosest, maltose, measles, meioses, messiah, mimosas, mismate, misseat, mitoses, molests, moolahs, oleates, omelets, oolemma, oolites, ooliths, osselet, osteoma, seamost, shmoose, siamese, smooths, soloist, somites, soothes, stomies, stoolie, tealess, teasels, theisms, tieless, toeless