Do you think the similarity of "Amma" to "amun" could be more than coincidental? Do you think "Amma" could represent all of reality?
Yes, I definitely do. Because, as in ancient Hebrew, vowels were not written in Egyptian hieroglyphic words, Amun can alternately be interpreted as Amen. Amma is the "hidden god" of the Dogon. His name also means "to grasp, hold firm, or establish". Amen is the "hidden god" of Egypt, whose name also means "to grasp" or "hold firm". The Hebrew term Amen that is spoken at the end of a prayer comes from a root that means "to establish". Likewise, the words Amma and Amen are equated to one another in some of the North African languages. Likewise, Amma and Amen hold comparable places in the Dogon and Egyptian mythologies, and share certain icons. So I see Amen as a direct Egyptian correlate to Amma.
For me, the word Amma is formed from the word Am, meaning "knowledge"(in the Biblical sense, procreation) and ma, meaning "to examine or perceive" - the act that catalyzes the formation of matter. Those terms place the symbolism of Amma at the initiating point of processes of creation.