The phrase "more acerose" refers to something that is increasingly needle-like or spiky in shape. Synonyms for this could include "sharper," "pointier," or "more bristly." Other options might be "more prickly," "more spiny," or "more thorny." All of these terms suggest a greater degree of sharpness or texture, and can be used to describe anything from plants and animals to man-made objects. Whether referring to a cactus, a porcupine, or a barbed wire fence, using these synonyms can help to add precision and clarity to your language, and allow you to convey your ideas more effectively.