"Revampment" is a term that refers to the process of improving or modernizing something that is outdated or no longer functional. There are several words that can be used as synonyms for "revampment", depending on the context. For example, "renovation" is a commonly used synonym, which specifically refers to the process of updating or improving the physical structure of something. "Redesign" is another synonym that pertains to the process of altering the appearance or functionality of an object or system. Other possible synonyms include "overhaul", "upgrade", "makeover", and "rejuvenation". In any case, each of these words refers to the act of transforming something old into something new and improved.