The word uncarbonated 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: 22
Highest Scoring Words With Friends™ Play In The Letters uncarbonated
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Seven Letter Word Alert: (66 words)
abandon, aborted, abreact, acrobat, acuated, andante, arcuate, autocar, barcode, baronet, bartend, bounced, bouncer, bounden, bounder, bracted, broaden, brocade, cabaret, cantred, caudate, centaur, contend, cordate, counted, counter, courted, crunode, curated, doubter, eductor, enactor, natured, neutron, noncute, nondate, nondebt, nuanced, obtrude, outbade, outbred, outdare, outearn, outrace, outread, readout, rebound, recount, redoubt, rotunda, tacnode, traduce, tranced, trounce, unabate, unboard, unboned, unbrace, uncared, uncored, uncrate, unearnt, unnoted, unrated, unrobed, untread