The word temperamentally 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: 29
Highest Scoring Words With Friends™ Play In The Letters temperamentally
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Seven Letter Word Alert: (67 words)
alertly, allayer, ammeter, amylene, analyte, aplenty, aptamer, arylate, element, emanate, empanel, emplane, empyema, enteral, entreat, eternal, lampman, lampmen, lamprey, lateral, maleate, manatee, mantrap, metamer, paleate, palette, palmate, patella, pattern, payment, peltate, penalty, planeta, plantar, planter, platter, playlet, plenary, prattle, prelate, prelaty, premeet, premelt, preteen, pteryla, rampant, repanel, repayal, replane, replant, replate, repleat, replete, retally, tapeman, tapemen, tartpan, tempera, tempter, ternate, terpene, tramell, tramman, trammel, trample, treelet, yealmer