The term "shell company" refers to a company that exists only on paper, without any significant assets or operations. Synonyms for shell company include "paper company," "dummy corporation," "front company," "empty vessel," and "fictitious entity." These terms are often used to describe companies that engage in illegal activities such as money laundering, tax evasion, and fraudulent business transactions. Shell companies can be used to hide the true ownership of assets and to launder money, making it difficult for law enforcement agencies to trace the source of the funds. As a result, many countries have put in place laws and regulations to prevent the formation and use of shell companies for illegal activities.