The word deliciousness 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
Seven Letter Word Alert: (77 words)
celsius, cession, codeine, consuls, cosines, coulees, counsel, cousins, cuisine, deciles, decline, delouse, denoise, diesels, diocese, discuss, doilies, eleidin, elision, eloined, elusion, enclose, encodes, endless, ensouls, eosinic, escudos, iceless, iciness, idolise, incised, incises, include, indices, indoles, induces, insides, insoles, inuloid, iodines, iodises, ionised, ionises, lesions, lessens, lessons, leucine, license, linseed, lioness, lionise, nodules, nuclide, oilseed, oldness, osseins, ossicle, seclude, seconds, seduces, sessile, session, silence, silicon, sinless, sinoids, sinuses, sluiced, sluices, sodless, sonless, suicide, sunless, unclose, uncoils, unoiled, useless