The term "hard drugs" generally refers to various illegal and highly addictive substances such as heroin, crystal meth, cocaine, and crack cocaine. However, there are other phrases and terms that can be used to describe hard drugs. Some common synonyms include "narcotics," "illicit drugs," "controlled substances," "street drugs," and "addictive drugs." These terms are often used to describe drugs that are highly regulated or prohibited by law. While the term "hard drugs" may be a commonly used phrase in popular culture, it is important to understand that these substances can have serious and sometimes deadly effects on individuals who abuse them.