| Part of speech | common noun |
|---|---|
| Plural | unies |
| Catalan | unió |
|---|---|
| Dutch | unie |
| English | union |
| Esperanto | unio |
| Faeroese | felagsskapur |
| Finnish | unioni |
| Italian | unione |
| Latin | unio |
| Low German | uny |
| Luxemburgish | Unioun |
| Norwegian | union |
| Papiamento | union |
| Polish | unia |
| Portuguese | união |
| Russian | союз |
| Spanish | unión |
| Swedish | union |
| West Frisian | uny |