The word moisteners 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: 14
Highest Scoring Words With Friends™ Play In The Letters moisteners
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Seven Letter Word Alert: (56 words)
emoters, entries, erotise, estrone, inserts, isomere, isomers, meioses, mentors, meronts, messier, meteors, metrise, minters, missort, misters, mitoses, moisten, moister, monster, mortise, mossier, nemesis, nesters, norites, nosiest, onetime, orients, reemits, remines, remints, remotes, renests, resents, restems, retimes, rosiest, seitens, seniors, sermons, sestine, siemens, sinters, smiters, soirees, somites, sorties, stenose, stereos, stomies, stoners, stonier, stories, tensors, trienes, triones