"Ampliate" is a relatively unused word that means to expand or enlarge. However, there are many synonyms that can be used in its place. "Expand" and "enlarge" are two of the most common alternatives, expressing the idea of making something bigger. "Extend," "stretch," and "lengthen" also convey the notion of making something longer or bigger. "Augment," "increase," and "enhance" are more nuanced synonyms that suggest improving or adding to something. "Intensify" and "deepen" are options when referring to emotional or psychological experiences. Ultimately, the choice of synonym depends on the context and tone of the writing, but there are numerous choices to convey the same meaning as "ampliate".