alterable

capable of being readily changed if my vacation plans were alterable, I'd change them Synonyms adaptable, adjustable, flexible, changeable, elastic, fluid, malleable, modifiable, pliable, variableRelated Words changing, fluctuating, inconstant, labile, unstable, unsteady, varying, versatileNear Antonyms constant, stable, steady, unchanging, uniform, unvaryingAntonyms established, fixed, immutable, inelastic, inflexible, invariable, nonmalleable, ramrod, set, unadaptable, unalterable, unbudgeable, unchangeable