 |
| English thesaurus | |||
| |||
| PPP | |||
| Prairie: 208 phrases in 27 subjects |
| Agriculture | 14 |
| Agrochemistry | 7 |
| American usage, not spelling | 6 |
| Amphibians and reptiles | 8 |
| Automobiles | 1 |
| Aviation | 1 |
| Biology | 47 |
| Botany | 16 |
| Cooking | 1 |
| Ecology | 8 |
| Entomology | 1 |
| General | 21 |
| Geography | 8 |
| Geology | 1 |
| Informal | 2 |
| Literature | 1 |
| Makarov | 31 |
| Mammals | 8 |
| Nautical | 3 |
| Oil / petroleum | 2 |
| Oil and gas technology | 1 |
| Ornithology | 5 |
| Politics | 1 |
| Robotics | 1 |
| Technology | 3 |
| Transport | 2 |
| Zoology | 8 |