When it comes to expressing the concept "more fundamentally", there are a variety of synonyms that can be used to convey a similar idea. Some possible options might include "essentially", "at the core", "at the heart of the matter", "inherently", or "basically". Each of these words captures a sense of something that lies at the foundation or root of a particular concept or situation. Whether you're writing an academic paper, a creative work, or simply trying to communicate an idea to others, considering different synonyms for "more fundamentally" can help you to express your thoughts more precisely and effectively.