| A | B |
| anatomist | expert in dissection and body parts |
| Arabist | expert in Arabic language and culture |
| arlologist | expert on primitive people |
| astrophysicist | expert in astronomy in a branch dealing with the physical and chemical makeup of celestial matter |
| bacteriologist | expert in bacteria in medicine, industry etc |
| botanist | plant expert |
| discophile | expert on music that is recorded |
| ecumenist | expert in, or one who practices the principles and practices of religious groups |
| entomologist | expert in insects |
| epidemiologist | expert in disease incidence, dist. and control |
| gastroenterologist | expert in stomach disease |
| ichthyologist | fish expert |
| metallurgist | expert in the science of metal |
| numistmatist | collection of coins, paper money, sometimes medals |
| oncologist | expert in tumors |
| ornithologist | bird expert |
| parasitologist | expert in parasites |
| pathologist | changes caused by disease in tissued and body |
| periodontist | supporting and investing teeth structures |
| teratologist | study of monsters |
| thanatologist | expert in death |
| urologist | urinary or urogenital tract |
| virologist | virsus |