The word triacetates 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 triacetates
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Seven Letter Word Alert: (38 words)
acaters, acerate, acetate, aerates, aeriest, artiest, atresia, attires, attract, attrist, attrite, caseate, cattier, cerates, citrate, creates, cristae, iratest, iterate, raciest, recites, restate, retaste, satiate, scatter, seriate, statice, striate, tartest, tastier, tatters, tattier, teacart, testate, testier, titrate, titters, trisect