The term "illegal drug" is commonly used to describe drugs that are prohibited by law. However, there are numerous synonyms used to describe these substances in various contexts. Such synonyms include controlled substances, illicit drugs, narcotic drugs, banned substances, prohibited drugs, street drugs, and recreational drugs. These terms all refer to drugs that have been declared illegal by law enforcement agencies and are prone to abuse. Furthermore, their usage is associated with the risks of addiction, overdose, and serious health problems. Therefore, it's crucial for individuals to understand the consequences of using illegal drugs, in whatever context or synonym they may be referenced.