The word illiterates 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™ Plays In The Letters illiterates
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Seven Letter Word Alert: (58 words)
aeriest, airiest, artiest, attires, elaters, elitist, illites, iratest, irisate, iterate, latites, letters, literal, litters, littler, rallies, rattles, realest, realise, realist, relates, restate, retails, retaste, retells, retiles, retills, retilts, retitle, rillets, saltier, seriate, settler, sillier, siltier, slatier, slitter, starlet, starlit, startle, stealer, stellar, sterile, stiller, stilter, striate, tallest, tallier, tallies, tastier, tellers, tellies, tertial, testier, tillers, tilters, trellis, trestle