Naturopath – a person who practices naturopathy, a drugless system of therapy based on the use of physical forces such as heat, water, light, air and massage.
Necrosis – death of cells or tissues.
Node – literally a knot, a node is a collection of tissue.
Nodule – a small collection of tissue.
Non-surgical – not of, relating to, involving, or used in surgery.
Nurse – a person skilled in nursing.
Nutrition – the science of taking in and utilizing foods.