able to adapt, adaptable, adjustable, alterable, alterative, brittle, capricious, changeable, checkered, corruptible, deciduous, dying, ephemeral, evanescent, ever-changing, fading, fickle, fleeting, flexible, flitting, fluid, fly-by-night, flying, fragile, frail, fugacious, fugitive, impetuous, impulsive, inconstant, insubstantial, kaleidoscopic, malleable, many-sided, metamorphic, mobile, modifiable, momentary, mortal, movable, mutable, nondurable, nonpermanent, nonuniform, passing, perishable, permutable, plastic, protean, proteiform, resilient, rubbery, short-lived, supple, temporal, temporary, transient, transitive, transitory, undurable, unenduring, unstable, variable, volatile