The word empiricists 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: 20
Highest Scoring Words With Friends™ Play In The Letters empiricists
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Seven Letter Word Alert: (32 words)
cesspit, empiric, impress, metrics, miscite, misstep, misters, mistier, permits, persist, picrite, pietism, pissier, pitiers, premiss, priests, scrimps, scripts, seismic, septics, simpers, smiters, spermic, spicers, spicier, spirits, spriest, sprites, stimies, stripes, tipsier, triceps