The term "vermiculate" refers to a texture or pattern that resembles the trails left by worms - gritty, grooved and jagged. The antonym of "more vermiculate" would be its opposite, which would be a smoother texture, with less or no grooves or ridges. Synonyms of this antonym can include terms like smooth, plain, even and unmarked, which represent the absence of the gritty, grooved appearance of vermiculate. The antonym could also be described as seamless, with no roughness or irregularities, and characterized by uniformity and consistency. The opposite of more vermiculate would therefore be a plainer, smoother, more regular texture.