"Glory days" is a phrase that typically refers to a nostalgic period in the past when someone experienced success and happiness. However, there are many synonyms that can be used to describe this time. Some options include "golden era," "heyday," "peak," "prime," "pinnacle," "zenith," and "high point." These words evoke a sense of achievement and positivity, emphasizing that this time was one of great accomplishment and fulfillment for the individual. Using these synonyms can help provide a fresh perspective on the memories associated with the "glory days," allowing individuals to appreciate them in a new and meaningful way.