What is a synonym for mega?

Excuse me, could you kindly elaborate on the concept of finding a synonym for the word "mega"? I'm curious to know if we're looking for a term that conveys a similar sense of enormity, magnitude, or extreme scale. In the realm of language, are we seeking a word that, when used, would effectively replace "mega" and still carry the weight of its meaning, perhaps something like "gigantic," "colossal," or "immense"? Clarifying this would greatly assist in providing an accurate synonym for "mega.