The word pasteurise 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: 14
Highest Scoring Words With Friends™ Play In The Letters pasteurise
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Seven Letter Word Alert: (51 words)
aeriest, asperse, aspires, austere, easiest, epurate, euaster, paresis, parties, pasters, pastier, pasties, pasture, peatier, persist, peruses, pesters, pirates, praises, presets, priests, purists, pussier, rapists, reissue, repaste, repasts, repeats, reseats, respite, resteps, retapes, satires, seaters, serapes, seriate, sparest, spireas, spriest, sprites, stripes, stupers, suiters, suspire, teasers, traipse, upraise, uprates, uprises, upstair, ureases