| Part of speech | unknown part of speech |
|---|
| Nominative | rusto |
|---|---|
| Accusative | ruston |
| Catalan | rovell |
|---|---|
| Dutch | roest |
| English | rust |
| Finnish | ruoste |
| French | rouille |
| German | Rost |
| Hungarian | rozsda |
| Norwegian | rust |
| Papiamento | frus; frusto |
| Portuguese | ferrugem |
| Spanish | herrumbre; orfín; óxido |
| Swedish | rost |
| West Frisian | roast |