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grounds : 1062 phrases in 40 subjects |
| Airports and air traffic control | 2 |
| American usage, not spelling | 2 |
| Automobiles | 4 |
| Aviation | 103 |
| Botany | 3 |
| Bricks | 1 |
| British English spelling | 2 |
| Carpentry | 14 |
| Chemistry | 35 |
| Construction | 41 |
| Earth sciences | 2 |
| Economics | 7 |
| Electronics | 1 |
| Figurative | 23 |
| General | 38 |
| Geology | 3 |
| Geophysics | 1 |
| Hunting | 1 |
| Hydrology | 5 |
| Ichthyology | 1 |
| Informal | 8 |
| Law | 556 |
| Mechanics | 1 |
| Medical | 2 |
| Military | 15 |
| Music | 1 |
| Oil / petroleum | 114 |
| Optics branch of physics | 1 |
| Paint, varnish and lacquer | 2 |
| Photography | 11 |
| Polygraphy | 22 |
| Religion | 1 |
| Road traffic | 2 |
| Road works | 3 |
| Slang | 2 |
| Soil science | 1 |
| Sports | 2 |
| Surveying | 2 |
| Technology | 26 |
| Zoology | 1 |