Capable of being changed, changeable, mutable

Something that can be altered; a variable.

The state or quality of being alterable.

plural of alterable

plural of alterer

One who alters.

(especially in the plural) An identity or headmate of a person with dissociative identity disorder (previously known as multiple personality disorder). A member of a system.

(transitive) To change the form or structure of. / (intransitive) To become different. / (transitive) To tailor clothes to make them fit.

Misspelling of altar.

(medicine, now historical) A medicine or treatment which works by changing processes within the body, rather than by evacuating something etc.