The word experimental 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 experimental
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Seven Letter Word Alert: (79 words)
ailment, aliment, arenite, element, elixate, emirate, empanel, emplane, emptier, enteral, eternal, exalter, examine, example, expiate, explain, explant, extrema, extreme, impaler, impanel, implant, inepter, latrine, lempira, lineate, maltier, manlier, marlite, matinee, mealier, meatier, meatpie, minaret, mineral, naptime, netmail, painter, palmier, peatier, penlite, pentail, perlite, pertain, plainer, planter, praline, preemie, prelate, premeet, premelt, premixt, preteen, primate, raiment, ratline, reexpel, relaxin, reliant, repaint, repanel, replait, replane, replant, replate, repleat, replete, reptile, retinal, tapemen, teenier, tempera, terpene, terpine, trainee, trample, trenail, triaene, triaxle