The word imperturbability cannot be made in Words With Friends™. It is 16 letters long, too long to fit on a WordsWithFriends board (15 letters max).
Highest Scoring Words With Friends™ Play In The Letters imperturbability
:
Seven Letter Word Alert: (114 words)
ability, abutter, airtime, arbiter, attirer, balmier, barbule, barmier, battery, battier, battler, bilayer, biliary, bimetal, bitpart, bitrate, bittier, blurter, bramble, brambly, bribery, brittle, brumate, bulimia, bumbler, bumpier, burbler, burlier, buttery, emptily, erratum, imbiber, imitate, impaler, imperil, impiety, impurer, irately, lamprey, laytime, lempira, liberty, library, limiter, lumpier, maltier, marbler, marlite, maturer, meatily, mebibit, merrily, militar, militia, muriate, mutable, mutably, palmier, pebibit, perturb, petabit, pettily, platter, plumber, plumier, prairie, prattle, prelaty, primary, primate, primula, pteryla, puberty, puttier, rambler, rapture, rarebit, ratbite, rattier, rattler, reality, rebuilt, replait, replumb, retrial, rubbery, rumbler, ruttier, tearily, tebibit, tempura, terabit, terbium, tertial, timbale, timbrel, titular, trailer, tramper, trample, trembly, triable, tribute, triplet, tritium, trumpet, tubbier, tumbler, turtler, typebar, uralite, utility, utterly, yttrium