The word cumulations 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: 21
Highest Scoring Words With Friends™ Plays In The Letters cumulations
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Seven Letter Word Alert: (35 words)
actions, alumnus, amounts, atomics, atonics, auction, auscult, autumns, cations, caution, columns, consult, cultism, lunatic, masonic, moulins, mucosal, musical, mutuals, oculist, oilcans, osculum, outmans, outsail, sanctum, solanum, somatic, stoical, suction, toucans, tsunami, umlauts, unclots, uncoils, unstoic