The word improprieties 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 improprieties
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Seven Letter Word Alert: (79 words)
emoters, emperor, empires, emptier, empties, epimers, episome, epitome, epitope, erotise, imports, imposer, isomere, itemise, meteors, metrise, mistier, miterer, moister, mopiest, moppers, mortise, peptise, permits, pieties, pietism, pitiers, poetise, porters, potpies, preempt, premier, premise, presort, preterm, primers, primost, promise, prompts, prosper, reemits, remorse, remoter, remotes, repipes, reports, reposer, reprime, reprise, respire, respite, restore, retimer, retimes, retires, retries, retrims, rioters, rippers, ripstop, roister, rompers, ropiest, soppier, stepper, stomper, stopper, striper, tempers, tempore, tippers, tippier, tipsier, toppers, toprims, tremors, trimers, tripper, trireme