| Part of speech | common noun |
|---|---|
| Hyphenation | fer·o |
| Singular | Plural | |
|---|---|---|
| Nominative | fero | feroj |
| Accusative | feron | ferojn |
| Afrikaans | yster |
|---|---|
| Catalan | ferro |
| Czech | železo |
| Danish | jern |
| Dutch | ijzer |
| English | iron |
| Faeroese | jarn |
| Finnish | rauta |
| French | fer |
| German | Eisen |
| Greek | σίδηρος |
| Hungarian | vas |
| Icelandic | járn |
| Italian | ferro |
| Kabylian | uzzal (ⵓⵣⵣⴰⵍ) |
| Latin | ferrum |
| Low German | yser |
| Luxemburgish | Eisen |
| Malay | besi |
| Norwegian | jern; jarn |
| Papiamento | eru; hero; heru |
| Polish | żelazo |
| Portuguese | ferro |
| Romanian | fier |
| Saterland Frisian | Iersen |
| Scottish Gaelic | iarann |
| Spanish | hierro |
| Sranan | isri |
| Swahili | chuma |
| Swedish | järn |
| Tagalog | bakal |
| Thai | เหล็ก |
| Turkish | demir |
| Welsh | haearn |
| West Frisian | izer |
| Yiddish | אײַזן |