The word incompetents 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™ Plays In The Letters incompetents
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Seven Letter Word Alert: (58 words)
cements, cenotes, coesite, compete, consent, content, contest, emetics, eminent, empties, entices, episome, epitome, incense, incomes, inspect, intense, intents, intones, itemset, mention, miocene, mittens, moisten, mopiest, nepotic, nominee, nonepic, notices, octenes, onestep, onetime, openest, pectens, pectins, pectose, pennies, pension, pentose, peonies, petites, pimento, pinenes, poetics, poetise, pontine, postmen, poteens, potties, section, smitten, spinnet, tempest, tenpins, tension, tinpots, tipmost, tiptoes