| AGROSTOLOGIST | • agrostologist n. One who studies agrostology. • AGROSTOLOGIST n. one who studies grasses. |
| CLIMATOLOGIST | • climatologist n. A person who studies, professes or practices climatology. • CLIMATOLOGIST n. one who studies climatology. |
| COSMETOLOGIST | • cosmetologist n. A person who advises people (normally women) on cosmetics and other beauty treatments; a beautician. • COSMETOLOGIST n. a person who gives beauty treatments, as to skin and hair. |
| DERMATOLOGIST | • dermatologist n. A person who is skilled in, professes or practices dermatology. • DERMATOLOGIST n. one who studies dermatology. |
| DIABETOLOGIST | • diabetologist n. A physician whose speciality is diabetology. • DIABETOLOGIST n. a doctor specializing in the study and treatment of diabetes and the care of diabetics. |
| ESCHATOLOGIST | • eschatologist n. One who practises eschatology. • ESCHATOLOGIST n. a specialist in eschatology. |
| GERONTOLOGIST | • gerontologist n. A physician who specializes in gerontology. • GERONTOLOGIST n. one who studies gerontology. |
| HAEMATOLOGIST | • haematologist n. A scientist, usually a medical doctor, who specializes in haematology. • hæmatologist n. Obsolete form of hematologist. • HAEMATOLOGIST n. a specialist in haematology, also HEMATOLOGIST. |
| HERPETOLOGIST | • herpetologist n. One who studies reptiles and amphibians; a reptile and amphibian specialist. • HERPETOLOGIST n. one who studies snakes. |
| INSECTOLOGIST | • insectologist n. A scientist who studies insects. • INSECTOLOGIST n. a student of insectology. |
| NARRATOLOGIST | • narratologist n. One who studies narratology. • NARRATOLOGIST n. one who studies narratology. |
| NEONATOLOGIST | • neonatologist n. A person who studies or applies neonatology, the medical science for newborn babies. • NEONATOLOGIST n. a specialist in neonatology. |
| ODONATOLOGIST | • odonatologist n. One who studies odonatology. • ODONATOLOGIST n. one who studies dragonflies. |
| OLFACTOLOGIST | • olfactologist n. One who studies olfactology. • OLFACTOLOGIST n. one who studies smells and the sense of smell. |
| ONOMATOLOGIST | • onomatologist n. One versed in the history of names. • ONOMATOLOGIST n. one who studies onomatology, the science of names. |
| PLANETOLOGIST | • planetologist n. Planetary scientist. • PLANETOLOGIST n. one who studies planetology. |
| PRIMATOLOGIST | • primatologist n. A scientist whose speciality is primatology. • PRIMATOLOGIST n. one who studies primates. |
| SOVIETOLOGIST | • Sovietologist n. A person who engages in Sovietology. • SOVIETOLOGIST n. an expert on Soviet affairs. |
| STOMATOLOGIST | • stomatologist n. (Medicine) A practitioner of stomatology. • STOMATOLOGIST n. a person who works in stomatology. |
| THANATOLOGIST | • thanatologist n. One who studies death. • THANATOLOGIST n. one who studies thanatology. |