Etiology is the medical term meaning cause of a disease
Pathology
Aetiology and patho-physiology
Etiology if you live in the United States. Add the A if you live in the U.K.
Pathology
Pathogen or pathogenesis.
Pathogenic means producing disease.
Pathology
Pathologic is a commonly used term that means "disease-producing". For example, a bacterium that causes disease is commonly called a pathologic bacterium.Pathogenesis is the condition of producing disease.
Symptom
Etiology is a generic term not a disease or condition. It is a branch of medical science concerned with the causes and origins of disease.
Gangrene is the medical term meaning that an ischemic area has developed a secondary pus-producing infection.
Pathogenic means producing disease.
Myelopathy is any disease or pathological condition of the spinal cord.
The medical term for fiber producing is fibrogenic.
Pathy (path = disease + y = process) is used to indicate a disease condition. Andropathy means disease processes particular to men. Pathology meand the process of studying diseases. Sometimes, instead of using "disease" the term will have it a medical condition. In that case you will see "-iasis" or "-osis added as a suffix as in hyperhydrosis (hyper = a lot + hydr = water + osis = condition of).
Dermatosis (any disease of the skin)
Psychopathology is the medical term meaning abnormal condition of the mind.
neuropathyNeuropathy = any diseased condition of the nervous system
Hansen's Disease is the medical term. But a more common term is Leprosy.