The word musicalness 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™ Play In The Letters musicalness
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Seven Letter Word Alert: (45 words)
acumens, aimless, amnesic, assumes, caesium, caseins, cauline, celsius, cesiums, cinemas, classes, clauses, emulsic, emulsin, encalms, icemans, icemass, inseams, inulase, lassies, leucism, macules, malices, manless, mensual, minuses, miscues, missals, misuses, mueslis, muscles, musical, muslins, mussels, sacless, salines, seminal, sensual, silanes, sinless, sinuses, sluices, sunless, unlaces, unseals