• 13th ___ (1865 addition to the Constitution that banned slavery)

• Change made in Washington

• Change of a sort

• Constitution addendum

• Constitutional add-on

• The First or Fourteenth, for example

• The act of amending

• A statement that is added to or revises or improves a proposal or document (a bill or constitution etc.) - we know the word that you can`t guess In case of any inconvenience..