Root Canaled Tooth Lesion: Does the term "lesion" refer to a space at root tip that bacteria has eaten into bone. Interchangeable word use?

Lesion: A region in an organ or tissue that has suffered damage through injury or disease, such as a wound, ulcer, abscess, tumor, etc These are your interchangeable words.
Lesion. A lesion is an area of damage. It can be inside the tooth, outside, or both. Please ask your treating Dentist or Endodontist (root canal specialist) to explain to you exactly the origin and extent of your infection, and the appropriate treatment.