The word motorisations 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: 17
Highest Scoring Words With Friends™ Plays In The Letters motorisations
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Seven Letter Word Alert: (40 words)
animist, artists, instars, intorts, maroons, martini, martins, matrons, mission, missort, mitosis, monitor, motions, notator, notists, oration, ottoman, raisins, ransoms, rations, rattons, rattoon, risotto, rototom, simians, somonis, statins, station, statism, strains, straint, straits, stroams, taoists, tomatos, torsion, transit, tritoma, tsarism, tsarist