| An -Ist | Studies, Collects, or Specializes In |
| nephrologist | |
| oenologist | |
| cruciverbalist | |
| seismologist | |
| mixologist | |
| entomologist | |
| lepidopterist | |
| philatelist | |
| citriculturist | |
| thanatologist | |
| ichthyologist | |
| herpetologist | |
| cryptologist | |
| bibliopolist | |
| | An -Ist | Studies, Collects, or Specializes In |
| cytologist | |
| ornithologist | |
| lapidist | |
| nematologist | |
| coleopterist | |
| pathologist | |
| numismatist | |
| etymologist | |
| malacologist | |
| apiarist | |
| taxidermist | |
| phycologist | |
| hematologist | |
|