Building on something is to develop an idea, concept, or relationship in a way that expands it further. Synonyms for "build on" include "expand on," "enlarge," "elaborate on," "enrich," "augment," "improve," "add to," "extend," "grow," "develop," and "further." These words emphasize the idea of building or constructing something in a deliberate and meaningful way. When we build on ideas or concepts, we add new layers of depth and understanding that increase their value and impact. Similarly, building on relationships involves creating stronger bonds and connections over time that deepen our understanding and appreciation of others.