When describing something "large-scale," there are a number of synonyms that can be used to effectively convey the same meaning. Some common options include "massive," "immense," "vast," "monumental," "gigantic," "enormous," "substantial," "colossal," "grandiose," and "majestic." Depending on the context, other descriptors such as "sizable," "sizeable," "significant," "sprawling," "extensive," "comprehensive," or "complex" may also be appropriate. By choosing the right synonym, writers can add richness and variety to their language, making their descriptions more engaging and impactful.