The word reinstall 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: 12
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (39 words)
antlers, antsier, elastin, entails, install, latrine, lentils, lintels, literal, nailers, nailset, nastier, rallies, ratline, realist, reliant, renails, rentals, reslant, restain, retails, retains, retills, retinal, retinas, rillets, salient, saltern, saltier, slatier, stainer, stellar, sternal, stiller, tallier, tallies, tillers, trellis, trenail