The word uncontrollably 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: 28
Highest Scoring Words With Friends™ Play In The Letters uncontrollably
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Seven Letter Word Alert: (36 words)
balcony, balloon, bluntly, buoyant, butanol, callboy, callout, cannolo, canonry, cartoon, contour, control, coolant, corolla, coronal, cotylar, country, courtly, crouton, curably, lobular, locally, locator, lullaby, nanobot, nonclay, noncola, notably, octoban, outcall, rollout, tonally, toolbar, truancy, truncal, tunably