Volcanologists rhymes with:
creatologists, necrologists, archaeologists, cardiologists, climatologists, creatologists, criminologists, dermatologists, ecologists, epidemiologists, geologists, ideologists, kremlinologists, meteorologist's, meteorologists, microbiologists, necrologists, oncologists, ophthalmologists, paleontologists, pharmacologists, radiologists, sociologists, sovietologists, technologists, toxicologists, virologists