The word nationalises 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: 15
Highest Scoring Words With Friends™ Play In The Letters nationalises
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Seven Letter Word Alert: (55 words)
aeolian, alanine, aliases, aniline, anneals, anoints, antlion, asinine, atlases, atonias, elastin, elation, elision, enlists, entails, inlines, inosine, inosite, insoles, intones, iolites, ionises, isolate, leantos, lesions, liaises, liaison, linnets, lioness, lionets, lionise, listens, nailset, nations, nonlate, nonsale, noseans, nosiest, oiliest, salient, salines, sealant, sealion, seitans, sestina, siennas, silanes, silents, sonatas, sonnets, stanols, tension, tinsels, toenail, tonsils