The word cholesterol 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: 18
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (37 words)
chooser, chortle, clothes, coheres, cohorts, colters, coolers, coolest, creoles, creosol, echoers, elector, etchers, heteros, hollers, holster, hostler, lechers, looters, ocelots, rechose, reclose, reshoot, retches, retells, retools, roselet, scooter, sheller, shelter, shooter, soother, tellers, tollers, toolers, torches, trochee