The word departmental 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: 21
Highest Scoring Words With Friends™ Play In The Letters departmental
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Seven Letter Word Alert: (83 words)
adapter, adepter, adrenal, aerated, alarmed, alerted, altered, amender, aptamer, dealate, deltate, dentate, deplane, emanate, emendal, emerald, empanel, emplane, enteral, entreat, eternal, leadman, learned, maleate, manatee, mandate, mandrel, mantled, mantrap, meander, metaled, mettled, nettled, paleate, palette, palmate, paneled, pattern, pearled, peltate, petaled, planeta, plantar, planted, planter, platter, pleader, pleated, prattle, predate, predeal, prelate, premade, premelt, pretend, rampant, rattled, readapt, reamend, redealt, redtape, related, remated, renamed, repanel, replane, replant, replate, replead, repleat, retaped, tapeman, tapemen, tapered, tartpan, tempera, tempted, tempter, ternate, tramped, trample, treadle, treated