Oncologist rhymes with:
ecologist, ethnomusicologist, pharmacologist, toxicologist, archaeologist, cardiologist, climatologist, criminologist, dermatologist, ecologist, epidemiologist, ethnomusicologist, gerontologist, immunologist, kremlinologist, meteorologist, microbiologist, ophthalmologist, opthalmologist, paleontologist, pharmacologist, physiologist, radiologist, serologist, sociologist, sovietologist, technologist, toxicologist, virologist