The word tuberosities 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 tuberosities
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Seven Letter Word Alert: (62 words)
besorts, betters, biotest, biotite, bistros, bitsets, bitsier, bitters, bittier, bossier, bousier, bruises, busiest, busters, bustier, butters, butties, erotise, estrous, obtuser, oestrus, ousters, outbets, outsees, outsets, outsits, rebites, reissue, retests, riboses, rosette, rosiest, serious, setters, sitters, soirees, sorbets, sorbite, sorties, sourest, stereos, stories, stourie, stouter, streets, strobes, subsite, subsort, subtest, subtree, suiters, suitors, tersest, testers, testier, toruses, tourist, touters, tribute, trustee, turbots, tutoree