a doctor who studies and treats skin diseases, dermatologist

pediatrician

gynecologist

a doctor who specializes in diseases of the digestive system, gastroenterologist

haematologist

a doctor who specializes in treating diseases of the heart, cardiologist

ophthalmologist

paediatrician

a psychiatrist is a doctor who treats people suffering from mental illness, psychiatrist

periodontist

recurring or epidemic diseases

hereditary diseases

venereal diseases

infectious diseases

diseases of impurity, venereal diseases, infectious diseases, depravity, malevolence

chronic diseases

expert of art, skill

scholar

the one who is excellent in a skill

an expert linguist, a polyglot

an expert in a particular art or skill

astrologist

psychologist

criminologist

a person who studies physics or whose job is connected with physics, physicist

a person who studies human sexual behaviour, sexologist

someone who studies or is an expert in sociology, sociologist

a scientist who studies biology, biologist

architect

toxicologist

(Medical) a physician

educationist

someone who studies, teaches, or is an expert in mathematics, mathematician

a person who scientifically studies animals, zoologist

expert in war-related matters

physiologist

economist

educationist, expert in teaching

a person who studies or has a special knowledge of economics, economist

Graphologist.

botanist

geologist

meteorologist

the expert of sky and his components, celestial expert

a person who studies or is an expert in the branch of zoology concerned with insects, entomologist

a jurist is a person who is an expert on law, jurist

acoustician

gynaecology, department of medical science which treats the functions and diseases peculiar to women

Cardialogy

Cardialogy

Eugenist.

a historian is a person who specializes in the study of history, and who writes books and articles about it, historian, chronicler, recorder, biographer, antiquarian