The word glutinousness 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: (87 words)
egoists, elogist, eloigns, elusion, eluting, elution, enlists, ensigns, ensouls, ensuing, glioses, glisten, glosses, gluiest, glutens, gunless, gussets, gussies, gutless, igneous, ingests, insoles, insults, intones, legions, lensing, lesions, lessons, lingoes, linnets, lioness, lionets, listens, longest, losings, lotuses, lounges, lousing, luniest, lusting, nesting, nonsuit, nosiest, osseins, ousting, outguns, outings, outlies, outline, outsung, sensing, session, signets, silents, singles, singlet, sinless, sinuous, sinuses, solutes, sonless, sonnets, stogies, stoning, sunless, sunnies, sunsets, tensing, tension, tenuous, tingles, tinsels, tissues, tongues, tonsils, tossing, tousles, tugless, tunings, tunnels, tussles, ugliest, unguent, unlists, unsling, unslung, utensil