The word viscometric 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: 24
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (27 words)
cometic, coverts, critics, erotics, evictor, icteric, ivories, ivorist, meiotic, metrics, miscite, mistier, misvote, moister, mortise, motives, oversit, revisit, somitic, stivier, vectors, verismo, victims, victors, visitor, voicers, vomiter