The word reclusiveness 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
Seven Letter Word Alert: (71 words)
celsius, censers, censure, cerises, cresses, cruises, cursive, cussers, elevens, elusive, ensures, enviers, essence, evinces, evulses, iceless, incurve, insures, inverse, issuers, leisure, lessees, lessens, leucine, license, receive, recline, recluse, recuses, reissue, relieve, relines, relives, rescues, reslice, revenue, reviles, revises, revulse, screens, secerns, secures, service, servile, sessile, silence, silvers, sincere, sinless, sinuses, sleeves, slicers, slivers, sluicer, sluices, snivels, sunless, sunrise, surveil, unreels, unreeve, unveils, useless, veilers, veinule, veneers, venules, versine, vesicle, vessels, viruses