The word antidiabetics 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 antidiabetics
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Seven Letter Word Alert: (52 words)
abscind, abstain, actants, antacid, attains, attends, bandits, battens, cabinet, candies, dacites, dataset, decabit, decants, deistic, dentist, descant, destain, detains, diabase, dibasic, diciest, dictate, dietics, dietist, discant, distant, ditties, incased, incised, incited, incites, indices, indicts, indites, instate, instead, nictate, sainted, satanic, satiate, scatted, stained, statice, stinted, tabinet, tainted, tetanic, tidbits, tidiest, tiniest, titanic