The word intestacies 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: 15
Highest Scoring Words With Friends™ Play In The Letters intestacies
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Seven Letter Word Alert: (32 words)
ascents, ascites, caseins, easiest, encases, entices, estates, iciness, incests, incises, incites, insects, instate, neatest, nictate, sateens, seances, secants, seitans, seitens, senates, sensate, sestina, sestine, stances, statice, statics, statins, tensest, tetanic, tiniest, titanic