The word nonhereditary 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: 20
Highest Scoring Words With Friends™ Play In The Letters nonhereditary
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Seven Letter Word Alert: (93 words)
adenine, adherer, adorner, andiron, aneroid, annoyed, annoyer, anodyne, another, arenite, deanery, dentine, dernier, detrain, dienyne, dietary, diether, diynone, doyenne, drainer, earthed, earthen, endnote, entrain, etaerio, hairnet, handier, hardier, hayride, headier, hearted, hearten, hennaed, heroine, hoarder, hoarier, honeyed, hornier, hydrant, hydrate, inerter, intoned, intoner, neither, neonate, nerdier, nitrene, nondate, nondiet, norther, ornater, otarine, randier, readier, readorn, reannoy, reentry, reheard, rehired, rehoned, reinter, retired, retrade, retrain, retread, retried, tannery, tardier, tarried, tearier, ternary, terrain, terrane, therein, thereon, thinned, thinner, thorned, thready, throned, thyroid, tindery, tinhorn, tireder, tradein, trained, trainee, trainer, treader, triaene, yearend, yearned, yearner