The word schematises 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: 19
Highest Scoring Words With Friends™ Play In The Letters schematises
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Seven Letter Word Alert: (32 words)
achiest, aitches, ascites, ashiest, atheise, atheism, chaises, chassis, chemist, easiest, emetics, hessite, icemass, machete, matches, messiah, miscast, misseat, sachets, scathes, schemas, schemes, schisms, schists, sesames, siamese, siestas, smashes, stashes, teaches, techies, theisms