The word variableness 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: 21
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (76 words)
abasers, abrases, abseils, aerials, airable, airbase, airless, aliases, arabise, arsenal, baleens, banaler, basilar, beanies, beavers, beslave, blesser, braises, braless, earless, enabler, enables, enseals, ensears, enslave, enviers, inverse, laveers, leaners, leasers, leavens, leavers, lesbian, nabales, nailers, ravines, realise, reavail, rebales, rebases, rebless, relines, relives, renails, resails, resales, resaves, reseals, reveals, reviles, revises, ribless, sailers, salines, salivas, salvers, salvias, savable, sealers, serials, servals, servile, several, silanes, silvans, silvers, slavers, sleaves, slivers, snivels, veilers, velaria, veneral, verbals, verbena, versine