The word legalization 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: 26
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (28 words)
aeolian, agatine, agatize, agonize, elating, elation, gallant, gallate, galleon, gelatin, genital, intagli, lignite, lilting, lionize, tagline, tailing, tangelo, teazing, telling, tillage, tilling, toenail, toiling, tollage, tolling, zealant, zillion