The antonyms of "more substratal" refer to concepts that are opposite in meaning that the term. Some antonyms for "more substratal" could be "less fundamental," "less fundamental," "superficial," or "less rooted." Alternatively, some antonyms for "more substratal" may include "ephemeral" or "transient," which hint at the idea of something that is fleeting or temporary. Other antonyms could be "less significant," "trivial," "insignificant" or "unimportant," indicating the lack of essential qualities or lack of importance. Ultimately, the antonyms for "more substratal" are words that describe concepts that are disparate and opposite in meaning to the term.