Anaphylactic is a medical term used to describe a severe and potentially life-threatening allergic reaction. There are several synonyms that can be used in place of this term, including anaphylaxis, hypersensitivity reaction, severe allergic reaction, and allergic shock. Other related terms include allergy, allergic response, allergy attack, and acute allergic reaction. While these terms may have slightly different connotations, they all refer to a serious and sudden allergic response that often requires immediate medical attention. It is important to understand the symptoms of anaphylactic reactions and to have a plan in place for managing them, particularly for individuals with a history of severe allergies.