The word institutionalises cannot be made in Words With Friends™. It is 17 letters long, too long to fit on a WordsWithFriends board (15 letters max).
Highest Scoring Words With Friends™ Plays In The Letters institutionalises
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Seven Letter Word Alert: (143 words)
altoist, aniline, annulet, anoints, antlion, asinine, assents, attests, attunes, aulists, aunties, autists, elastin, elation, elision, elitist, eluants, elusion, elution, enlists, ensouls, entails, ileitis, initial, inlines, inosine, inosite, insists, insoles, instant, instate, insulin, insults, intents, intones, intuits, inulase, inulins, iolites, ionises, isolate, lassies, lassoes, latents, latites, leantos, lesions, lessons, liaises, liaison, linnets, lioness, lionets, lionise, listens, lotuses, lunates, luniest, lutists, lutites, nailset, nations, nonlate, nonsale, nonsuit, noseans, nosiest, notists, nutlets, oiliest, osseins, outlast, outlets, outlies, outline, outsail, outsets, outsits, salient, salines, salutes, sealion, seasons, seitans, sensual, session, sestina, siennas, siestas, silanes, silents, sinless, sinuate, sinuses, situate, solutes, sonless, sonnets, stalest, stanols, statins, station, statist, statues, statute, stetson, sultans, sunless, sunnies, sunsets, suntans, sustain, talents, taluses, tannest, taoists, tassels, tattles, tautens, tautest, tenants, tension, tetanus, teutons, tiniest, tinsels, tissues, titlist, toenail, toilets, toluate, tonsils, tousles, tuition, tunnels, tussles, unities, unlists, unseals, unseats, unstain, utensil, utilise