The word psychiatrist 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: 22
Highest Scoring Words With Friends™ Play In The Letters psychiatrist
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Seven Letter Word Alert: (30 words)
airship, artists, casspir, charity, haptics, harpist, pachisi, physics, piarist, pyritic, racists, rapists, raspish, rattish, satiric, scripts, spastic, spirits, starchy, statics, straits, styptic, tartish, thirsts, thirsty, tipcart, tipcats, tsarist, typists, yttrias