The word neutralist 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: 13
Highest Scoring Words With Friends™ Play In The Letters neutralist
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Seven Letter Word Alert: (92 words)
antlers, antsier, artiest, astuter, attires, attunes, aunties, elastin, eluants, entails, entrust, estrual, instate, insular, intrust, inulase, iratest, latents, latites, latrine, litters, lunates, luniest, lustier, lutites, nailers, nailset, nastier, natters, nattier, natures, neutral, nitrate, nutlets, nutsier, nutters, nuttier, ratline, rattles, realist, reliant, renails, rentals, reslant, restain, retails, retains, retilts, retinal, retinas, retints, rituals, rutiles, salient, saltern, saltier, saluter, saunter, sinuate, situate, slatier, slitter, stainer, starlet, starlit, startle, stature, sternal, stilter, straint, striate, stunter, talents, tastier, taunter, tautens, tertial, tetanus, tilters, tinters, titular, transit, trenail, truants, turtles, unalert, unalter, uniters, uralite, urinals, urinate, utensil