 |
| permeable: 67 phrases in 21 subjects |
| Agriculture | 4 |
| American usage, not spelling | 1 |
| Analytical chemistry | 4 |
| British usage, not spelling | 1 |
| Business | 1 |
| Chemistry | 6 |
| Coal | 2 |
| Construction | 10 |
| Earth sciences | 1 |
| General | 6 |
| Life sciences | 3 |
| Medical appliances | 8 |
| Mining | 1 |
| Municipal planning | 1 |
| Natural resourses and wildlife conservation | 4 |
| Nuclear physics | 1 |
| Optics branch of physics | 1 |
| Physics | 5 |
| Technology | 2 |
| Textile industry | 3 |
| Transport | 2 |