The word fiddlesticks 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: 25
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (30 words)
deficit, deistic, delicts, delists, desilts, deticks, diciest, dietics, dislike, dissect, distils, elicits, felsics, fiddles, fissile, flicked, kiddies, kidless, sickest, sickled, sickles, sidelit, skidlid, slicked, sticked, stickle, stifled, stifles, tickled, tickles