| APICULTURIST | • apiculturist n. Beekeeper. • APICULTURIST n. a beekeeper. |
| ASTROTOURIST | • astrotourist n. Space tourist. • ASTROTOURIST n. one who pays to visit space as a tourist. |
| AUDIOMETRIST | • audiometrist n. A technician who carries out audiometry. • AUDIOMETRIST n. one who measures differences in hearing, also AUDIOMETRICIAN. |
| AVICULTURIST | • aviculturist n. A person who keeps and rears (breeds) birds. • AVICULTURIST n. one who practises aviculture. |
| BEHAVIOURIST | • behaviourist n. Britain standard spelling of behaviorist. • BEHAVIOURIST n. an adherent of behaviourism. |
| BIOTERRORIST | • bioterrorist n. A terrorist employing biological weapons. • bioterrorist adj. Of or relating to a bioterrorist or bioterrorism. |
| CARICATURIST | • caricaturist n. A person who draws caricatures. • CARICATURIST n. one who draws caricatures. |
| COLEOPTERIST | • coleopterist n. (Entomology) One who studies beetles. • COLEOPTERIST n. one who studies beetles. |
| ECONOMETRIST | • econometrist n. An econometrician. • ECONOMETRIST n. a student of econometrics. |
| ECOTERRORIST | • ecoterrorist n. One who engages in ecoterrorism. • ECOTERRORIST n. one who practises ecological terrorism. |
| HYPSOMETRIST | • HYPSOMETRIST n. a practitioner of hypsometry, the measuring the heights of places on the earth's surface. |
| NEUROPTERIST | • neuropterist n. An entomologist whose speciality is lacewings of the order Neuroptera. • NEUROPTERIST n. a person who studies the Neuropteroidea, lacewing flies. |
| ORTHOPTERIST | • orthopterist n. An entomologist who specialises in orthopters. • ORTHOPTERIST n. a student of insects. |
| PHOTOMETRIST | • photometrist n. A specialist in photometry. • PHOTOMETRIST n. one who practises photometry, that branch of science which treats of the measurement of the intensity of light. |
| PSYCHIATRIST | • psychiatrist n. (Medicine) A medical doctor specializing in psychiatry. • PSYCHIATRIST n. one who practises psychiatry, also PSYCHIATER. |
| SOCIOMETRIST | • sociometrist n. One who carries out sociometry. • SOCIOMETRIST n. one who practises sociometry. |
| VOLUNTOURIST | • voluntourist n. A tourist who takes part in voluntourism. |