The word autographing 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: 23
Highest Scoring Words With Friends™ Play In The Letters autographing
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Seven Letter Word Alert: (31 words)
aphonia, arguing, atropia, gigaton, grating, groping, guarani, gunport, hangout, harping, hurting, orating, outgain, outgrin, paragon, parging, parting, piranha, porting, pouring, pouting, prating, purging, puritan, rainhat, rainout, roguing, routing, touring, upright, utopian