The word asymptomatic 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: 26
Highest Scoring Words With Friends™ Plays In The Letters asymptomatic
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Seven Letter Word Alert: (23 words)
atomics, atomism, commits, copyist, cystoma, cytomas, impacts, impasto, miscopy, myomata, myotics, opacity, potamic, scatoma, somatic, stomata, styptic, symptom, tapioca, tipcats, tipmost, tomcats, topmast