The word cicatrised 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: 17
Highest Scoring Words With Friends™ Plays In The Letters cicatrised
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Seven Letter Word Alert: (35 words)
accited, accites, airiest, airside, arctics, aridest, ascetic, astride, credits, cristae, critics, dacites, dairies, deictic, deistic, diaries, diarist, diciest, dietics, directs, dirties, disrate, ditsier, drastic, icteric, irisate, raciest, radices, redacts, satiric, sciatic, sidecar, tidiers, tirades, triadic