The word miniaturising 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 miniaturising
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Seven Letter Word Alert: (40 words)
airguns, airings, amusing, animist, arising, atriums, gastrin, guitars, ingrain, inturns, inuring, margins, martini, martins, matings, migrant, minting, misting, misturn, mustang, nursing, raining, raising, ranting, ratings, ringman, rinsing, ruining, rusting, smiting, snaring, stannum, staring, suiting, timings, tsunami, tunings, turning, uniting, unstain