The word acquisitiveness 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: 33
Highest Scoring Words With Friends™ Play In The Letters acquisitiveness
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Seven Letter Word Alert: (66 words)
acquest, acquist, acquits, actives, antique, ascents, ascites, assents, aunties, avenues, caseins, cuisine, cuneate, easiest, encases, ensuite, entices, equates, equines, evinces, iciness, incests, incises, incites, inquest, inquiet, insects, insists, invects, invests, invitee, invites, naivest, natives, nutcase, qiviuts, quantic, quiesce, quieten, quinces, quintic, sanctus, sateens, seances, secants, seitans, seitens, senates, sensate, sequent, sequins, sestina, sestine, siestas, sinuate, sinuses, squints, stances, suavest, sunsets, sustain, tissues, unities, unseats, uveitis, vainest