Meliorated is a word that means "improved" or "made better or more satisfactory". There are many synonyms that can be used in its place, such as enhanced, refined, elevated, upgraded, optimized, ameliorated, bolstered, fortified, heightened, and enriched. Each of these words conveys the idea of improvement, though they may have slightly different connotations or be more appropriate in specific contexts. For example, enhanced might be used to describe an improvement to the quality of a product or service, while bolstered might be used to describe an improvement to someone's confidence or strength. Overall, there are many great synonyms for meliorated, and it's always best to choose the one that fits the specific context and desired tone of a piece of writing.