The word severalties 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 severalties
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Seven Letter Word Alert: (68 words)
aeriest, airless, artless, earless, easiest, eeriest, elaters, elative, elevate, estival, evilest, laveers, leasers, leavers, realest, realise, realist, relates, release, relieve, relists, relives, resails, resales, resaves, reseals, reseats, restive, retails, retiles, reveals, reviles, revises, sailers, saltier, salvers, satires, sealers, seaters, serials, seriate, servals, servile, servlet, several, sievert, silvers, slaters, slatier, slavers, sleaves, sleeves, slivers, starves, stealer, steelie, sterile, stivers, strives, svelter, tealess, teasels, teasers, tieless, travels, veilers, verists, veritas