The word prevaricated 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: 23
Highest Scoring Words With Friends™ Play In The Letters prevaricated
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Seven Letter Word Alert: (82 words)
acerate, activer, adapter, adepter, aerated, airdate, apteria, arrived, avarice, averred, averted, averter, aviated, cadaver, capered, captive, carried, catered, caterer, created, decrier, deprave, deprive, deriver, deviate, erratic, evicted, parader, peatier, pervade, pervert, picrate, pierced, piercer, pirated, predate, predict, preedit, prerace, private, radiate, rapider, ratrace, reacted, readapt, readier, receipt, recited, reciter, recrate, redrape, redrive, redtape, repaced, repaved, repaver, reprice, reraped, retaped, retired, retrace, retrade, retread, retried, rivered, riveted, riveter, tapered, taperer, tardier, tarried, tearier, tepider, terrace, tiaraed, tireder, treader, vacated, vapider, variate, verdict, vraiced