The word criminalise 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: 19
Highest Scoring Words With Friends™ Play In The Letters criminalise
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Seven Letter Word Alert: (38 words)
airline, amnesic, arcsine, arsenic, carmine, carnies, cinemas, claimer, eclairs, encalms, icemans, irenics, laicise, lancers, mailers, malices, manlier, marines, marlins, menisci, mincers, mineral, miracle, nailers, realism, reclaim, remails, remains, renails, scalier, seminal, seminar, sericin, similar, siriema, sirname, slimier, smilier