The word interiorises 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: 13
Highest Scoring Words With Friends™ Plays In The Letters interiorises
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Seven Letter Word Alert: (50 words)
entries, erotise, estrone, inerter, inosite, inserts, ioniser, ionises, ironers, ironies, nesters, noisier, norites, nosiest, orients, reinter, renests, renters, rerents, rerinse, resents, resorts, resters, restirs, restore, retires, retries, rinsers, rioters, roister, rosiest, rosters, seitens, seniors, sestine, sinters, snorers, snorter, soirees, sorters, sorties, stenose, stereos, sterner, stoners, stonier, stories, tensors, trienes, triones