The word predominates 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™ Plays In The Letters predominates
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Seven Letter Word Alert: (360 words)
adepter, adipose, admires, adonise, adopter, aeriest, amender, amidone, amperes, aneroid, animose, aniseed, anodise, anomers, antsier, arenite, aridest, armpits, artsmen, aspired, astride, astroid, atomise, atoners, daemons, damners, dampens, dampers, dampest, dearest, dearies, demates, demeans, dements, demerit, demirep, demotes, deniers, denoise, denotes, departs, depones, deports, deposer, deposit, despair, despite, destain, destine, detains, detrain, diapers, diatoms, diester, dieters, dimeter, diopter, dioptre, disrate, domains, donairs, donates, dopants, dopiest, dormant, earnest, eastern, editors, emirate, emoters, empires, emptied, emptier, empties, enamors, endears, endmost, endorse, entraps, entries, epiderm, epidote, epimers, episode, episome, epitome, erotise, estrone, etaerio, imparts, impasto, impedes, impends, imports, imposed, imposer, indorse, inepter, inmates, inroads, instead, isomere, maestro, maidens, marines, martens, martins, mastoid, matinee, matrons, meander, meanest, meanies, meatier, meatpie, medians, mediate, menders, mentors, merited, meronts, meteors, metrise, minaret, minders, mindset, minters, misdate, misdoer, misdone, misread, mitered, moaners, moderns, moisten, moister, monster, mopiest, moraine, mordant, mordent, mortise, naptime, nastier, nearest, nimrods, norites, notepad, oarsmen, onestep, onetime, openers, openest, operand, operant, operate, opiated, opiates, ordains, orients, otarine, painted, painter, panders, panters, panties, pardons, parents, parotid, parties, pastier, pastime, patined, patines, patrons, peatier, pedants, pentode, pentose, peonies, peridot, periods, permits, persona, pertain, petards, pimento, pioneer, pirated, pirates, poetise, pointed, pointer, pomades, ponders, portend, posited, postern, postman, postmen, poteens, praised, predate, preedit, premade, premise, prenote, present, preside, pretans, pretend, primase, primate, primost, printed, promise, pronate, pronest, protean, protein, pterins, radomes, raiment, randoms, rations, readies, readmes, readmit, readopt, reamend, reasted, redates, redtape, reedits, reemits, remains, remands, remated, remates, remends, reminds, remined, remines, remints, remotes, renamed, renames, reopens, repaint, repaste, repeats, repents, repined, repines, repoint, repoman, reposed, respade, respite, respond, restain, restamp, retains, retaped, retapes, reteams, retimed, retimes, retinas, ripened, roadies, roadmen, roasted, rodents, roisted, romaine, ropeman, ropemen, ropiest, roseate, rosined, sainted, sandier, sandpit, sardine, seamier, seaport, sedater, seminar, senator, seriate, seriema, serpent, sidearm, sideman, sirname, smarted, smarten, smartie, smeared, snorted, soapier, sortied, speared, spender, spinode, spirted, spondee, sported, stained, stainer, stamped, stamper, standee, stander, stardom, steamed, steamer, sterane, sterned, steroid, stipend, stomped, stomper, stonier, storied, stormed, striped, tampers, tampons, tandems, tapemen, tapered, tasered, tempera, tempers, tempore, tenders, tepider, terpine, tierods, tinders, tirades, tonearm, toprims, topside, torpids, tradein, trained, trainee, traipse, tramped, treason, trepans, triaene, tridems, trienes, triones, tripeds, tripods