changeable

Changeable is a synonym of flexible.

As adjectives the difference between flexible and changeable

is that flexible is capable of being flexed or bent without breaking; able to be turned, bowed, or twisted, without breaking; pliable; not stiff or brittle while changeable is capable of being changed.

As a noun flexible

is something that is flexible.

As adjectives the difference between changeable and weatherlike

is that changeable is capable of being changed while weatherlike is resembling the weather in some way; changeable, unpredictable, following a seasonal pattern, etc.