The word impetiginous 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 impetiginous
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Seven Letter Word Alert: (50 words)
egotism, emoting, gnomist, igneous, ignites, impetus, impinge, impious, impugns, inosite, minuets, minutes, misting, mistune, mitogen, moisten, mopiest, mountie, mousing, munites, nutmegs, ousting, outings, outspin, pietism, pigeons, pigment, pigmies, pigouts, pimento, pingoes, piteous, poising, posting, postmen, poutine, pouting, puniest, smiting, souping, spinout, spiting, spuming, stuping, suiting, tiepins, timings, tongues, unities, uptimes