The word neurotropic 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: 19
Highest Scoring Words With Friends™ Plays In The Letters neurotropic
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Seven Letter Word Alert: (40 words)
contour, cornier, coroner, coronet, corrupt, counter, courier, crooner, crouton, cuprite, current, ecotour, nepotic, outcrop, picture, pointer, porcine, porotic, portico, portion, pouncer, poutier, poutine, printer, proctor, procure, prootic, protein, recount, recruit, reincur, reinput, repoint, reprint, routine, runtier, trooper, trounce, trouper, unriper