The Oxford Thesaurus An A-Z Dictionary of Synonyms - amendment n.

1) correction, emendation, reformation, change, alteration, rectification, repair, reform, improvement, amelioration, betterment, enhancement: The committee approved the amendment of the constitution by the addition of the suggested paragraphs. 2 attachment, addition, addendum; clause, paragraph; alteration: A two-thirds majority in the Congress is needed to pass the amendment.