The word comestibles 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: 21
Highest Scoring Words With Friends™ Play In The Letters comestibles
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Seven Letter Word Alert: (30 words)
becomes, beslime, betimes, betoils, bisects, boletes, cleomes, closest, closets, cobless, coesite, cosiest, embolic, emetics, iceless, meioses, mitoses, mobiles, molests, oecists, omelets, osselet, ossicle, selects, sitcoms, somites, stomies, telecom, tieless, toeless