Endemiology is the study of endemic diseases and their distribution within a population. Synonyms for the word include epidemiology, epidemicology, and outbreak investigation. Epidemiology involves the study of the frequency, distribution, and determinants of disease in different populations. Similar to endemiology, epidemicology focuses on the spread of diseases, but often refers to larger outbreaks or pandemics. Outbreak investigation involves identifying the source of an outbreak and implementing measures to control it. These synonyms are all related to the study of diseases and their distribution, but have slightly different nuances and focus areas depending on the context.