The word metabolically 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™ Plays In The Letters metabolically
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Seven Letter Word Alert: (38 words)
acolyte, actable, acylate, allelic, alltime, aloetic, amiable, amiably, amoebic, bimetal, callboy, calomel, cambial, citable, climate, coalite, collate, cotylae, emacity, embolic, iceball, iceboat, labiate, lacteal, lamella, laytime, lobelia, locally, lyocell, meatily, metical, micella, mycelia, mycetal, myeloic, oatmeal, tamable, timbale