The word privatises 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™ Play In The Letters privatises
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Seven Letter Word Alert: (35 words)
airiest, aspires, irisate, paresis, parties, passive, pasters, pastier, pasties, persist, piarist, pirates, pissier, pitiers, praises, priests, private, rapists, repasts, revisit, satires, sparest, spireas, spirits, spriest, sprites, starves, stivers, stivier, stripes, strives, tipsier, traipse, verists, veritas