The word anagrammatize 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: 31
Highest Scoring Words With Friends™ Plays In The Letters anagrammatize
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Seven Letter Word Alert: (39 words)
agatine, agatize, amanita, amazing, amentia, anaemia, anagram, animate, garment, gateman, gazania, granite, ingrate, magenta, magnate, manager, mangier, margate, marmite, martian, migrant, migrate, minaret, mintage, nametag, ragtime, raiment, ramming, reaming, tanager, tangier, tangram, teaming, tearing, teazing, tramman, tzarina, zingara, zingare