The word unexploratory 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: 28
Highest Scoring Words With Friends™ Play In The Letters unexploratory
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Seven Letter Word Alert: (52 words)
aplenty, apteryx, entropy, eutaxon, explant, luxator, nepotal, neutral, operant, opulent, oratory, ornater, outearn, outleap, outplan, outplay, outpray, outroar, outyelp, oxolane, oxytone, parlour, partner, penalty, planter, platoon, plenary, plouter, polaron, portray, poulter, poultry, praetor, prelaty, pronate, pronely, prorate, protean, protura, pteryla, pyrrole, rapture, realtor, replant, ternary, tourney, trooper, trouper, unalert, unalter, unlayer, urotoxy