The word multivalence 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: 26
Highest Scoring Words With Friends™ Play In The Letters multivalence
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Seven Letter Word Alert: (33 words)
ailment, aliment, alltime, calumet, cauline, cavemen, clement, climate, cuneate, cutline, elative, eluvial, emulant, emulate, enclave, leucine, leucite, lineate, lunatic, matinee, metical, micella, micelle, mullite, nematic, netmail, nutmeal, valence, veinlet, veinule, velamen, victual, vinelet