The word economizers 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: 27
Highest Scoring Words With Friends™ Play In The Letters economizers
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Seven Letter Word Alert: (28 words)
coiners, crimson, cronies, ecozone, encores, erosion, incomer, incomes, ionomer, isomere, mercies, microns, mincers, miocene, miszone, moronic, necrose, noisome, omicron, ozonise, recoins, remines, rezones, sincere, snoozer, someone, zeroise, zircons