The word ectodermal 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: 18
Highest Scoring Words With Friends™ Play In The Letters ectodermal
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Seven Letter Word Alert: (36 words)
alerted, altered, amerced, caroled, catered, cleared, comrade, cordate, creamed, created, cremate, decamer, declare, delator, demerol, earldom, earmold, elector, emerald, leotard, located, metaled, modeler, octamer, oracled, racemed, reacted, redealt, relaced, related, remated, remodel, telecom, telomer, treacle, treadle