Ampliation is a term often used in legal contexts to mean the act of enlarging or extending the scope of a legal document. However, there are several synonyms for this term that can be used in its place. One such synonym is expansion, which denotes the act of making something larger or more extensive. Another alternative is extension, which suggests the act of reaching or stretching something beyond its current boundaries. Other possible synonyms for ampliation could include augmentation, enlargement, or broadening. Ultimately, the choice of synonym depends on the context in which the term is being used and the desired effect the writer wishes to achieve.