bluster, brother, buckler, buffer, Butler, Butler's, butter, cluster, cluttered, color, coloured, colours, comer, cover, culture, cupboard, custard, Cutler, cutter, drummer, duller, flutter, Glover, govern, gunner, gutter, hover, Hubbard, hundred, Hussars, jugglers, juster, lover, luster, lustre, mother, Muller, mustard, muster, mutter, other, plumber, rather, rougher, rubber, rudder, runner, sculptor, sculpture, shudder, shutter, smother, smugglers, Somers, southern, stubborn, subtler, suburb, succor, succour, sucker, suffer, sulfur, sulphur, summer, supper, tougher, Tucker, ulcer, Ulster, upper, upward, usher, utter, vulgar, vulture

another, another's, discolored, discoloured, discover, midsummer, recover, uncover

rediscovered, undiscovered