The phrase "most sextuple" means six times as much or six times greater than something else. Some synonyms for this phrase include "sixfold," "six times more," "six times larger," and "six times greater." Additionally, words such as "sextuple," "hexadic," "sixfold," and "six-part" can be used interchangeably to express the concept of six-fold or six times. Depending on the context and the desired tone, other synonyms for "most sextuple" can include "super-sized," "enlarged," "expanded," or "amplified." Overall, there are many ways to express the concept of something being six times greater than something else, and a variety of synonyms can be used to convey this idea effectively.