doctor

similar words: physician especially AmE, GP British English, consultant, registrar
 

a doctor who does operations: surgeon
 

a doctor who treats mental illnesses: psychiatrist, psychotherapist, shrink informal
 

a doctor who treats people's teeth: dentist, orthodontist 

,a doctor who treats animals: vet  

 veterinarian especially AmE
 

someone who is training to be a doctor: medical student, intern American English
 

the place where you go to see your doctor: surgery British English, office