| Interlingue | ile-000 |
| firm | |
| English | eng-000 | decided |
| English | eng-000 | fast |
| English | eng-000 | firm |
| English | eng-000 | hard |
| English | eng-000 | set |
| English | eng-000 | staunch |
| English | eng-000 | steadfast |
| English | eng-000 | steady |
| English | eng-000 | tight |
| Interlingue | ile-000 | astrict |
| Interlingue | ile-000 | cert |
| Interlingue | ile-000 | constant |
| Interlingue | ile-000 | decidet |
| Interlingue | ile-000 | desfacil |
| Interlingue | ile-000 | dur |
| Interlingue | ile-000 | fidibil |
| Interlingue | ile-000 | fix |
| Interlingue | ile-000 | fort |
| Interlingue | ile-000 | loyal |
| Interlingue | ile-000 | penosi |
| Interlingue | ile-000 | positiv |
| Interlingue | ile-000 | resoluet |
| Interlingue | ile-000 | resolut |
| Interlingue | ile-000 | rigid |
| Interlingue | ile-000 | secur |
| Interlingue | ile-000 | solid |
| Interlingue | ile-000 | stabil |
| Interlingue | ile-000 | tendet |
| русский | rus-000 | крепкий |