radiologist (n.)

• anesthesiologist
• cardiologist
• chiropodist
• dermatologist
• geriatrician
• gerontologist
• gynecologist
• immunologist
• internist
• neurologist
• obstetrician
• oculist
• ophthalmologist
• orthopedist
• otolaryngologist
• otologist
• pathologist
• pediatrician
• pediatrist
• podiatrist
• psychiatrist
• radiobiologist
• radiochemist
• serologist
• specialist