The word percentiles 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™ Play In The Letters percentiles
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Seven Letter Word Alert: (87 words)
centers, centres, cistern, clients, cretins, crispen, eclipse, eeriest, enteric, enticer, entices, entrees, entries, epicene, epistle, inepter, inspect, lectern, lenites, license, pectens, pectins, peelers, pelites, pelters, pencils, penlite, percent, perlite, petrels, pierces, pincers, precent, precise, prelect, present, preteen, princes, pterins, receipt, recipes, recites, recline, reclips, reelect, relents, relines, repeels, repents, repiles, repines, replete, replies, reptile, reslice, respect, respelt, respice, respite, resplit, retiles, scenter, scepter, sceptre, secrete, seepier, serpent, silence, sincere, sleeper, specter, spectre, splenic, splicer, steelie, steepen, steeper, steeple, stencil, sterile, teenier, tensile, terpene, terpine, triceps, trienes, triples