The word overexploits 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™ Play In The Letters overexploits
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Seven Letter Word Alert: (84 words)
elopers, epistle, epoxies, erosive, erotise, estriol, evilest, experts, expires, exploit, explore, exports, exposer, exposit, extirps, extoler, isotope, loiters, loopier, looters, oolites, orioles, overlie, overlit, overset, oversit, overtip, overtop, pelites, pelters, perlite, petiole, petrels, petrols, pivoter, plexors, plosive, plovers, poetise, politer, poorest, poxiest, provost, proxies, relives, repiles, repilot, repivot, replies, replots, reptile, resolve, respelt, respite, resplit, respool, restive, retiles, retools, reviles, revolts, revotes, ropiest, roselet, servile, servlet, sextile, sievert, sootier, spoiler, spooler, sterile, stoolie, stooper, svelter, toilers, toolers, topsoil, triples, tripole, veilers, vetoers, violets, volepox