The word cessations 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™ Plays In The Letters cessations
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Seven Letter Word Alert: (31 words)
aconite, actions, ascents, ascites, assents, atonics, caisson, caseins, casinos, cassons, cations, cession, consist, cosiest, cosines, incests, insects, nosiest, notices, octanes, oecists, osseins, seasons, secants, section, seitans, session, sestina, siestas, stances, tocsins