The word servilities 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: 16
Highest Scoring Words With Friends™ Play In The Letters servilities
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Seven Letter Word Alert: (24 words)
evilest, ileitis, relists, relives, restive, retiles, reviles, revises, revisit, servile, servlet, sievert, siltier, silvers, slivers, sterile, stivers, stivier, strives, svelter, tieless, veilers, veilier, verists