| English thesaurus | |||
| |||
| HO | |||
|
head-on : 20 phrases in 13 subjects |
| Agriculture | 1 |
| Astronautics | 1 |
| Communications | 1 |
| Economics | 1 |
| Fish farming pisciculture | 1 |
| Life sciences | 2 |
| Mechanic engineering | 1 |
| Medical | 4 |
| Metallurgy | 1 |
| Physical sciences | 1 |
| Politics | 1 |
| Technology | 1 |
| Transport | 4 |