The word adversities 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™ Plays In The Letters adversities
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Seven Letter Word Alert: (75 words)
adverse, adverts, advisee, adviser, advises, aeriest, airiest, airside, aridest, astride, averted, avidest, dairies, daisies, dearest, dearies, deities, derives, deserts, desires, dessert, devests, deviate, deviser, devises, diaries, diarist, diester, dieters, dieties, dirties, disease, disrate, ditsier, diverse, diverts, divests, easiest, evaders, irisate, readies, reasted, redates, reedits, resaved, resaves, reseats, resides, restive, revised, revises, revisit, riveted, satires, seaside, seaters, sedater, sedates, seriate, sievert, starved, starves, stivers, stivier, strides, strived, strives, tasered, teasers, tidiers, tirades, tressed, verists, veritas, visited