The word developmental 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 developmental
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Seven Letter Word Alert: (32 words)
alveole, deplane, deplete, develop, devotee, dovelet, element, elevate, emendal, empanel, emplane, enolate, envelop, lapeled, lemoned, leveled, mantled, metaled, nepotal, notepad, novella, paneled, pentode, petaled, planted, pleated, tadpole, tapemen, tollman, tollmen, valeted, velamen