Dentist: a person qualified to treat the diseases and conditions that affect the teeth and gums, especially the repair and extraction of teeth and the insertion of artificial ones. The dentist helps with teeth.
Part of speech: noun
Electrician: a person who installs and maintains electrical equipment. The electrician installs the internet.
Part of speech: noun
Emergency medical technician: a person who is specially trained and certified to administer basic emergency services to victims of trauma. The emergency medical technician helped in the accident.
Part of speech: noun