List of protean synonyms and protean related words.
able to adapt, adaptable, adjustable, allotropic, alterable, alterative, changeable, changeful, checkered, diversiform, ever-changing, flexible, fluid, heteromorphic, heteromorphous, impermanent, kaleidoscopic, labile, malleable, manifold, many-sided, metamorphic, metamorphotic, mobile, modifiable, movable, multifarious, multifold, multiform, multiphase, multiple, multiplex, mutable, nonuniform, permutable, plastic, polymorphic, polymorphous, proteiform, resilient, rubbery, supple, transient, transitory, unsettled, unstable, unsteady, variable