The phrase "most vegetal" generally refers to something that is very plant-like or has characteristics of a vegetable. Some possible synonyms for this phrase could include "most plant-like," "most herbaceous," "most verdant," "most leafy," or "most green." These words all suggest a connection to nature and the plant world, and can be used to describe a variety of things, from food to landscapes to clothing. Depending on the context, other possible synonyms might include "most organic," "most natural," or "most sustainable." Ultimately, the best synonym for "most vegetal" will depend on the specific meaning and context of the phrase in question.