The word underexposure 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: 27
Highest Scoring Words With Friends™ Plays In The Letters underexposure
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Seven Letter Word Alert: (51 words)
deepens, depones, deposer, endorse, endures, ensured, ensurer, expends, expense, exposed, exposer, expound, needers, openers, perused, ponders, pounder, pourers, preened, preener, prouder, pruners, pursued, pursuer, renders, reopens, reposed, reposer, repours, reprune, resound, respond, rounder, roundup, serener, sneered, sneerer, sounder, speeder, spender, spondee, spurned, spurner, spurred, supered, undoers, unposed, unsexed, uprouse, usurped, usurper