The word autotomising 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 autotomising
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Seven Letter Word Alert: (40 words)
agonism, agonist, agoutis, amongst, amounts, amusing, animist, gnomist, intuits, matings, matting, misting, moating, mooting, motions, mousing, mustang, mutants, ominous, ottoman, ousting, outgain, outings, outmans, outmost, outsang, sitting, smiting, sooting, stating, station, suiting, tasting, tauting, timings, tomatos, tooting, touting, tsunami, tuition