The word mortuaries 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 mortuaries
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Seven Letter Word Alert: (38 words)
armoire, armours, armrest, arouser, artsier, atomise, atriums, erratum, maestro, marries, maturer, matures, moister, mortars, mortise, mousier, muriate, mustier, reroast, retours, retrims, rioters, roamers, roaster, roister, rostrum, routers, rustier, smarter, smartie, stourie, tarries, tourers, tourism, tremors, trimers, trouser, urostea