The word retractors 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: 13
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (28 words)
carrots, carters, coarser, coaster, costate, cotters, craters, creator, ratters, reactor, recoats, rectors, reroast, restart, retoast, retorts, retract, roarers, roaster, rotates, rotters, scatter, starter, terrors, toaster, tracers, tractor, trocars