The word soapberries 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: 17
Highest Scoring Words With Friends™ Plays In The Letters soapberries
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Seven Letter Word Alert: (50 words)
abioses, asperse, aspirer, aspires, bearers, berries, bossier, braiser, braises, brasier, erasers, isobars, paresis, parsers, poesies, praiser, praises, presser, probers, raisers, raspers, raspier, reapers, rearise, rearose, rebases, rebores, repairs, reparse, reposer, reposes, repress, reprise, reprobe, rerapes, resorbs, resorps, respire, riboses, serapes, sierras, soapers, soapier, soarers, soberer, soirees, sparers, sparser, spearer, spireas