The word obscurantism 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 obscurantism
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Seven Letter Word Alert: (96 words)
abortus, actions, amounts, atomics, atonics, atriums, auction, bariums, bastion, biomass, bistros, bonsais, botanic, brutism, bucinas, caisson, cambist, cantors, carbons, caribou, cartons, casinos, castors, cations, caution, citrons, cobnuts, combats, combust, consist, costars, cousins, cranium, cratons, crimson, cuatros, cubisms, cubists, curtain, customs, incrust, instars, isobars, marconi, martins, mascots, masonic, matrons, microns, miscast, miscuts, missort, misturn, mosaics, mucosas, nitrous, nostrum, obtains, omnibus, outmans, racisms, racists, rainout, ransoms, rations, rubicon, rustics, sabinos, sacrums, sanctum, sanctus, scorias, scrotum, sitcoms, somatic, strains, stroams, strobic, submits, subsort, suction, suitors, sunstar, sustain, tocsins, toucans, tourism, tsarism, tsunami, turbans, unbaits, uncarts, uncross, unsorts, unstoic, urnmoss