The word uniformities 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: 20
Highest Scoring Words With Friends™ Plays In The Letters uniformities
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Seven Letter Word Alert: (63 words)
fermion, firmest, foister, foments, forints, forties, fortune, fumiest, informs, infuser, infusor, inosite, interim, ioniser, ironies, mentors, meronts, minters, mintier, minuets, minuter, minutes, misfire, mistier, mistune, misturn, moisten, moister, monster, mortise, mounter, mountie, mousier, munites, mustier, netform, niftier, nitrous, noisier, norites, nostrum, nutsier, orients, outfire, remints, remount, routine, runtime, snifter, sternum, stonier, stourie, surfeit, termini, tonsure, tourism, triones, unforms, unifier, unifies, uniform, uniters, unities