The word reassembles 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™ Plays In The Letters
Seven Letter Word Alert: (28 words)
amblers, armless, beseems, besmear, blamers, blesser, blesses, braless, brasses, earless, embases, emerses, leasers, lessees, marbles, measles, rambles, rebales, rebases, reblame, rebless, release, resales, reseals, sealers, seamers, seeable, sesames