The word noncontagious 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 noncontagious
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Seven Letter Word Alert: (49 words)
actions, agnosic, agonist, agoutis, anoints, atonics, atoning, auction, canning, cannons, canting, cantons, casting, cations, causing, caution, coating, conning, consign, contain, costing, cunning, gnostic, incants, nations, nonagon, nonsuit, nooning, noosing, notions, octagon, oogonia, ousting, outgain, outings, outsang, saucing, sooting, stannic, stoning, suction, sunning, tanning, tannins, toucans, tunings, unction, unstain, unstoic