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| English thesaurus | |||
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| HARD | |||
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Helmet : 38 phrases in 14 subjects |
| Environment | 1 |
| Forestry | 2 |
| General | 5 |
| Health care | 2 |
| Hobbies and pastimes | 3 |
| Industry | 5 |
| Labor law | 9 |
| Life sciences | 1 |
| Metallurgy | 1 |
| Natural sciences | 1 |
| Patents | 3 |
| Politics | 1 |
| Statistics | 2 |
| Transport | 2 |