The word disingenuousness cannot be made in Words With Friends™. It is 16 letters long, too long to fit on a WordsWithFriends board (15 letters max).
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (57 words)
dengues, denning, denoise, designs, dingies, dinning, dissing, donning, dousing, dungeon, endings, endogen, engined, engines, ensigns, ensuing, genesis, genuine, genuses, guessed, guesses, gussied, gussies, igneous, indigos, innings, inosine, insides, inuendo, iodines, iodises, ionised, ionises, issuing, needing, nonenes, oneness, osseins, seeding, sending, sensing, session, sidings, signees, sinning, sinoids, sinuous, sinuses, sissies, snudges, sudsing, sundogs, sunnies, sunning, undines, undoing, unsound