"Archigenesis" is a relatively obscure term, and so synonyms for it are not abundant. However, there are a few terms that may be related. "Genesis" itself refers to the origin or creation of something, and could be considered a broader term encompassing the concept of archigenesis. Other terms that may be somewhat synonymous include "creation," "origination," and "beginning." Each of these terms conveys the idea of something being brought into existence. While they may not be direct synonyms for archigenesis, they capture a similar essence of the idea of a beginning or foundational point.