Swotter is a slang term used to describe someone who studies excessively or is a "nerd". However, there are several synonyms that can be used instead of swotter. The word "grind" can be used to describe someone who studies diligently and persistently. "Bookworm" is another term that is commonly used to refer to someone who loves reading and studying. "Scholar" can also be used to describe someone who has extensive knowledge on a particular subject. Other synonyms include "geek", "brainiac", "intellectual", and "overachiever". While these terms may have different connotations, they all refer to individuals who excel in academic pursuits.