The word positioners 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: 15
Highest Scoring Words With Friends™ Play In The Letters positioners
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Seven Letter Word Alert: (73 words)
erosion, inosite, inserts, inspire, insteps, ioniser, ionises, ironies, isospin, isotope, noisier, noosers, norites, nosiest, operons, options, orients, osteons, persist, persons, pissier, pistons, pitiers, pointer, poisons, poorest, poroses, porosis, portion, postern, posters, potions, priests, prisons, pronest, protein, protons, pterins, repoint, reposts, respins, respots, ropiest, rosiest, seniors, sinters, snipers, snooper, sooners, soonest, sootier, sorties, spinets, spinier, spinose, spirits, sponsor, sporont, spriest, sprints, sprites, stepson, stoners, stonier, stooper, stories, stripes, tensors, tiepins, tipsier, toonies, torsion, triones