| Irish Rugby Football Union | Irish Rugby Football Union |
| Irish Sea | Mer d'Irlande |
| Irish stew | Irish stew |
| Irish Stock Exchange | Irish Stock Exchange |
| Irish theatre | Théâtre irlandais |
| Irish Traveller | Travellers |
| Irish Volunteers | Irish Volunteers |
| Irish whiskey | Irish whiskey |
| Irishman | Irlandais |
| Irishmen | Irlandais |
| Irishwoman | Irlandaise |
| Iriswoman | Irlandaise |
| Iriver | IRiver |
| IRIX | Irix |
| irk | ennuyer |
| irksome | ingrat |
| Irkutsk | Irkoutsk |
| Irkutsk Airport | Irkoutsk |
| Irkutsk International Airport | Irkoutsk |
| Irma | Irma |
| Irma Grese | Irma Grese |
| Irma la Douce | Irma la douce |
| Irma Lair | Irma Lair |
| Irmin | Irmin |
| Irminsul | Irminsul |
| Irn-Bru | Irn-Bru |
| Irnerius | Irnerius |
| IRNSS | Indian Regional Navigational Satellite System |
| Iroda Tulyaganova | Iroda Tulyaganova |
| iron | repasser |
| Iron Age | âge de fer |
| iron and steel industry | industrie sidérurgique |
| Iron Butterfly | Iron Butterfly |
| Iron chloride | Chlorure de fer |
| Iron Cross | Croix de fer |
| Iron Crown of Lombardy | Couronne de fer de Lombardie |
| Iron Curtain | rideau de fer |
| Iron Duke class battleship | Classe Iron Duke |
| Iron Gate | Portes de Fer |
| Iron Guard | Garde de fer |
| iron industry | industrie sidérurgique |
| Iron John | Jean de fer |
| Iron Maiden | Iron Maiden |
| Iron Maiden discography | Discographie officielle de Iron Maiden |
| Iron Man match | Iron Man match |
| Iron meteorites | Meteorite ferreux |
| Iron oxide | Oxyde de fer |
| Iron pillar | Pilier de fer de Delhi |
| Iron pyrites | Pyrite |
| iron scrap | ferraille |
| iron-gray | gris fer |
| Ironbridge | Ironbridge |
| Ironbridge Gorge | Iron Bridge |
| ironclad | à toute épreuve |
| Ironclad warship | Tekkōsen |
| Ironforge | Undercity |
| ironic | ironique |
| ironically | ironiquement |
| ironing | repassage |
| ironing board | planche à repasser |
| ironing table | planche à repasser |
