The word determinateness 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: 21
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (292 words)
adenine, admires, aeriest, amender, aniseed, antsier, arenite, aridest, artiest, artists, artsmen, astride, attends, attired, attires, damners, dearest, dearies, demasts, demates, demeans, dements, demerit, demesne, demises, demists, deniers, densest, dentate, dentine, dentins, dentist, deserts, desires, desmans, dessert, destain, destine, detains, detente, detents, detests, detrain, diester, dieters, dimeter, dimness, dinners, disarms, disease, disrate, dissent, distant, earnest, easiest, eastern, eeriest, emender, emersed, emerses, eminent, emirate, emitted, emitter, enamine, endears, enemies, ensears, ensnare, entente, entered, entrain, entrant, entreat, entrees, entries, estates, esteems, indents, inmates, innards, insaner, inseams, inserts, instant, instars, instate, instead, intends, intense, intents, interns, iratest, itemset, iterate, madness, maidens, manners, marines, martens, martins, masters, matinee, matters, meander, meanest, meanies, meatier, medians, mediate, meeters, menders, merited, messier, metered, metrise, metrist, minaret, minders, mindset, minters, misdate, misread, misseat, misters, mitered, mittens, nastier, natters, nattier, nearest, neatens, neatest, needers, needier, nemesis, nesters, netters, nitrate, nitrene, raiment, readies, readmes, readmit, reamend, reasted, redates, redeems, redness, reedits, reemits, reested, remains, remands, remated, remates, remeets, remends, reminds, remined, remines, remints, remnant, renamed, renames, renests, rennets, resands, reseats, reseeds, resends, resents, resides, restain, restate, restems, retains, retaste, reteams, retests, retimed, retimes, retinas, retints, sainted, sanders, sandier, sandmen, sardine, sateens, satires, seamers, seamier, seaside, seaters, sedater, sedates, seeders, seedier, seitans, seitens, seminar, senates, senders, sensate, seriate, seriema, sestina, sestine, settees, setters, siamese, sidearm, sideman, siemens, siennas, sinners, sinters, sirname, sitters, smarted, smarten, smartie, smatter, smeared, smiters, smitten, sneered, snidest, stained, stainer, stamens, standee, stander, started, staters, statins, statism, steamed, steamer, steered, stented, sterane, sterned, stinted, strains, straint, straits, strands, streams, streets, striate, strides, tainted, tandems, tanners, tannest, tasered, tasters, tastier, teasers, teatime, teemers, teenier, teeters, tenants, tenders, tenners, tensest, tenters, tentier, termite, ternate, tersest, testers, testier, tinders, tinners, tinters, tirades, tradein, trained, trainee, transit, treated, tressed, triaene, tridems, trident, trienes, tsarism, tsarist