That can be reformed.

The quality of being reformable; potential for reform.

The change of something that is defective, broken, inefficient or otherwise negative, in order to correct or improve it

(transitive) To put into a new and improved form or condition; to restore to a former good state, or bring from bad to good; to change from worse to better

a political movement/party

Of Reform Judaism, its tenets, or its adherents.

plural of Reformer

Of the Protestant movement typically associated with John Calvin, as separated from the Lutheran Church to pursue more extensive reformation.

plural of reformism

present participle of reformat