The antonyms for the word "more mega" are "less" and "mini." While "more mega" signifies an increase in size, scale, or magnitude, "less" denotes a reduction or decrease. It can be used to refer to decreased quantity, size, or intensity. "Mini," on the other hand, is used to refer to things that are smaller in size, scope, or capacity. It is often used as an adjective to describe products, models, or versions of something that is smaller than the original or standard version. In conclusion, the antonyms of "more mega" are "less" and "mini," which signify a decrease and a smaller scale, respectively.