The word multiculturalisms 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™ Play In The Letters multiculturalisms
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Seven Letter Word Alert: (51 words)
alliums, arillus, artists, atriums, aulists, auscult, autists, crustal, cultism, cultist, cumular, cumulus, curials, curiums, curtail, italics, lutists, miasmic, militar, misaims, miscall, miscast, miscuts, missuit, mistral, musical, mutuals, racisms, racists, rituals, rustics, sacrums, satiric, scillas, silicas, similar, starlit, statics, statism, stimuli, straits, stratum, stratus, summits, sutural, titular, tritium, tsarism, tsarist, tumults, umlauts