The term "pathological drinker" refers to someone who has developed a severe and potentially life-threatening addiction to alcohol. Other commonly used synonyms for this term include chronic alcoholic, heavy drinker, and alcohol-dependent. Some also use terms such as alcoholic or alcohol addict to describe someone with this level of dependency. It is important to use sensitive and respectful language when discussing addiction, as it is a serious medical condition that requires professional help and support. If you or someone you know is struggling with alcohol addiction, seeking help from a medical professional or addiction specialist can be an important step towards recovery.