The word overexploiting 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: 32
Highest Scoring Words With Friends™ Play In The Letters overexploiting
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Seven Letter Word Alert: (93 words)
egotrip, elixing, eloping, envelop, eviting, exigent, exiling, exiting, exploit, explore, extoler, gentile, gentler, gitoxin, goopier, igniter, ignitor, inepter, integer, invitee, inviter, invitro, leering, lignite, lintier, liriope, loonier, loopier, looping, looting, olivine, overlie, overlit, overtip, overtop, peeling, peering, peeving, pelting, penlite, perlite, petiole, pingler, pinitol, pioneer, pivoter, pointer, politer, pooling, porting, portion, prenote, prevent, proline, prolong, protege, protein, proving, reeling, reeving, repilot, repivot, repoint, reptile, retinol, ringlet, rioting, roiling, rooting, telogen, terpine, tiering, tingler, toiling, tooling, topline, treeing, tripole, veering, veilier, veiling, veinier, veinlet, veliger, vertigo, vetoing, vinelet, violent, violing, vitrine, vitriol, volepox, xerogel