The word metencephalon 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 metencephalon
:
Seven Letter Word Alert: (51 words)
acetone, anemone, canteen, channel, chaplet, cheapen, chelate, cholate, clement, coalmen, compete, echelon, element, empanel, emplace, emplane, enchant, enhance, enolate, epochal, ethanol, heeltap, heptane, heptene, lactone, machete, manhole, menthol, methane, montane, neonate, nepotal, nonlate, nonleap, nonmale, nonmate, nonmeal, nonmeat, pacemen, penance, penname, pentane, pentene, phantom, phenate, phoneme, polecat, potheen, tapemen, taphole, telecom