The phrase "built on" can be effectively expressed through many synonyms in the English language, including established on, founded on, constructed upon, rooted in, erected on, based on, formulated around, assembled on, set on, and constructed from. Each of these words has its own connotation and usage, but all of them convey the idea of creating something new from a strong foundation. "Built on" can be used to describe physical structures, abstract concepts, cultural traditions, and personal relationships, so having a variety of synonyms to choose from adds nuance and complexity to our descriptions of these things.