| isorel | hardboard |
| Isorno | Isorno |
| Isoroku Yamamoto | Isoroku Yamamoto |
| Isorythmie | Isorhythm |
| Isoschizomère | Isoschizomere |
| Isospin | Isospin |
| Isospin faible | Weak isospin |
| Isostasie | Isostasy |
| Isosurface | Isosurface |
| isotherme | isotherm |
| Isotherme zéro degré | Zero degree isotherm |
| Isotone | Isotone |
| isotope | isotope |
| Isotope fertile | Fertile material |
| Isotrétinoïne | Isotretinoin |
| Isotta Fraschini | Isotta-Fraschini |
| Isoélectronique | Isoelectronicity |
| Ispahan | Esfahan |
| Isparta | Isparta Province |
| Ispaster | Ispaster |
| Ispica | Ispica |
| Isra et Miraj | Al-Isra |
| Israel Aircraft Industries | Israel Aerospace Industries |
| Israel Beytenou | Yisrael Beiteinu |
| Israel Gelfand | Israel Gelfand |
| Israel Kamakawiwo`ole | Israel Kamakawiwoʻole |
| Israel Zangwill | Israel Zangwill |
| Israir Airlines | Israir Airlines |
| israélien | Israeli |
| Israélienne | Israeli |
| Israélite | Hebrew |
| Israël | Israel |
| Israël Abehassera | Baba Sali |
| Israël en Égypte | Israel in Egypt |
| Israël et le Concours Eurovision de la chanson | Israel in the Eurovision Song Contest |
| Israël Finkelstein | Israel Finkelstein |
| Israël Galili | Yisrael Galili |
| Israël Meir Kagan | Yisrael Meir Kagan |
| Israël Shamir | Israel Shamir |
| Israël Vibration | Israel Vibration |
| Israëlite | Hebrew |
| ISRC | International Standard Recording Code |
| Issa Hassan | Issa Hassan |
| Issachar | Issachar |
| Issai Schur | Issai Schur |
| Issayas Afeworki | Isaias Afewerki |
| Issei Sagawa | Issei Sagawa |
| Issenheim | Issenheim |
| Isser Harel | Isser Harel |
| Isshin Chiba | Isshin Chiba |
| Issilkoul | Isilkul |
| ISSN | International Standard Serial Number |
| Issoria | Queen of Spain Fritillary |
| Issoudun | Issoudun |
| issu de | descended from |
| issue | outlet |
| issue de secours | emergency exit |
| Issue fatale | Fatal outcome |
| Issy-les-Moulineaux | Issy-les-Moulineaux |
| IST | Ist |
| ISTAF | ISTAF |
| Istakhr | Istakhr |
| Istanbul | Istanbul |
| isthme | isthmus |
| Isthme de Carélie | Karelian Isthmus |
| Isthme de Corinthe | Isthmus of Corinth |
| Isthme de Courlande | Curonian Spit |
| Isthme de Kra | Kra Isthmus |
| Isthme de Panamá | Isthmus of Panama |
| Isthme de Perekop | Isthmus of Perekop |
| Isthme de Tehuantepec | Isthmus of Tehuantepec |
| Isthmian Football League | Isthmian League |
| Isthmian Football League Premier Division | Isthmian League Premier Division |
| İstiklâl Marşı | İstiklâl Marşı |
| Istiophoridae | Marlin |
| Istituto nazionale di statistica | Istituto Nazionale di Statistica |
| Istituto per la ricostruzione industriale | Istituto per la Ricostruzione Industriale |
| Istrie | Istria |
| Istriote | Istriot language |
| Istro-roumain | Istro-Romanian language |
| Istvan Bilek | István Bilek |
| István Bittó | István Bittó |
| István Báthory | Stephen VIII Báthory |
| István Nyers | István Nyers |
| István Szabó | István Szabó |
| István Széchenyi | István Széchenyi |
| István Tisza | István Tisza |
| Isuzu | Isuzu |
| Isère | Isère |
| Isée | Isaeus |
| Isérables | Isérables |
| ITA | ITA |
| Itabuna | Itabuna |
| Itacaré | Itacare |
| Italian for Beginners | Italian for Beginners |
| Italica | Italica |
| Italie | Italy |
| Italie des valeurs | Italy of Values |
| Italie médiévale | Italy in the Middle Ages |
| Italien | Italian |
| Italien septentrional | Northern Italian language |
| Italienne | Italian |
| Italiens | Italian people |
| Italiotes | Italiotes |
| italique | italic |
| Italiques | Ancient Italic peoples |
| Italo Calvino | Italo Calvino |
| Italo Disco | Italo disco |
| Italo Svevo | Italo Svevo |
