Misuse of the term. Withdrawal characterizes the effects of abstinence from a substance that causes a change in metabolism where the substance becomes a necessity for normal bodily function. Only opioids and Nicotine produce a metabolic dependancy and withdrawal syndrome.
Drugs like Alcohol, Barbiturates, etc do not create a dependancy and metabolic need, they simply depress front brain activity and function to the point that when use is stopped, the body reacts with a rebound effect in the form of delerium tremens, seizures, anxiety, insomnia, etc. Cocaine, Amphetamines, etc cause a similar problem, only in reverse: excess front brain stimulation, resulting in a rebound effect of lethargy, anhedonia, somnolesence, etc Both are examples of abstinence syndrome.