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