The word behavioristic 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: 25
Highest Scoring Words With Friends™ Play In The Letters behavioristic
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Seven Letter Word Alert: (92 words)
abiotic, achiest, activer, actives, aerobic, airiest, aitches, archive, ascribe, baiters, barites, batches, bathers, bearish, biotech, biotics, birches, bitsier, boarish, boaster, boaters, borates, borscht, botcher, botches, bothers, bravest, bravoes, breaths, brioche, cashier, cavorts, chariot, chaster, cithers, coaster, cohabit, coheirs, cohibit, coverts, cristae, earshot, erotica, erotics, evictor, haricot, harvest, hastier, herbist, heroics, iceboat, irisate, itchier, ivories, ivorist, obverts, obviate, octaves, ostrich, ovaries, overact, overbit, oversat, oversit, raciest, rebaits, rebatch, rebaths, reboast, recoats, revisit, rhotics, richest, roaches, satiric, scoriae, sorbate, sorbite, stivier, strobic, thrives, torches, varices, vectors, veritas, vibrate, vibrato, vibrios, victors, viscera, visitor, voicers