The word enterpriser 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: 15
Highest Scoring Words With Friends™ Plays In The Letters enterpriser
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Seven Letter Word Alert: (43 words)
eeriest, enterer, entrees, entries, inepter, inerter, preener, present, preteen, printer, pterins, reenter, reinter, renters, repents, repiner, repines, reprint, reprise, rerents, rerinse, respire, respite, retiree, retirer, retires, retrees, retries, seepier, serener, serpent, sneerer, steepen, steeper, steerer, sterner, stirrer, striper, teenier, terpene, terpine, terrier, trienes