The suffix -ology comes from the Greek word logos, meaning knowledge or to study. The words below ending in -ology denote some studies or knowledge.
Anthropology – The study of human beings
Entomology –The scientific study of insects
Dermatology – The study of the skin
Biology – The study of life or leaving organisms
Geology – The study of the Earth
Gynaecology – The study of diseases peculiar to women
Microbiology – The study of micro-organisms
Neurology – The study of nerves
Ophthalmology – The study of the eyes
Psychology – The study of the psyche or the mental processes
Virology – The study of virus
Zoology – A branch of biology that studies animals