The word strategist 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: 12
Highest Scoring Words With Friends™ Play In The Letters strategist
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Seven Letter Word Alert: (30 words)
aigrets, artiest, artists, attests, attires, attrist, attrite, gaiters, gassier, iratest, sagiest, satires, sitters, stagers, stagier, staters, statist, straits, striate, targets, tartest, tasters, tastier, tatters, tattier, tigress, titrate, titters, triages, tsarist