| interminable | interminabile |
| intermingle | frammezzare |
| intermingles | miscredenza |
| intermission | pausa |
| intermittent | intermittente |
| intermittent noise | rumore intermittente |
| intermix | frammischiare |
| intermixed | frammisto |
| Intermodal freight transport | Trasporto intermodale |
| intern | interno |
| internal | interno |
| internal combustion engine | motore a scoppio |
| Internal communications | Comunicazione interna |
| internal conflict | dilemma |
| Internal diameter | Calibro |
| internal European market | mercato europeo interno |
| internal genitals | organi genitali interni |
| internal migration | migrazione interna |
| Internal motion | Moti interni |
| Internal Revenue | gettito fiscale |
| internal-combustion engine | motore a combustione interna |
| internalisation of external costs | internalizzazione dei costi |
| international | internazionale |
| International Agency for Research on Cancer | IARC |
| international agreement | accordo internazionale |
| International agreement or convention | Trattato internazionale |
| International Air Transport Association | International Air Transport Association |
| International Air Transport Association airport code | Codice aeroportuale IATA |
| International Alphabet of Sanskrit Transliteration | Alfabeto internazionale per la translitterazione del sanscrito |
| international assistance | aiuto internazionale |
| International Association of Athletics Federations | IAAF |
| International Association of Exorcists | Associazione internazionale degli esorcisti |
| International Association of Nitrox and Technical Divers | International Association of Nitrox and Technical Divers |
| International Astronomical Union | Unione Astronomica Internazionale |
| International Astronomical Youth Camp | International Astronomical Youth Camp |
| International Atomic Energy Agency | Agenzia Internazionale per l'Energia Atomica |
| International Atomic Time | Tempo atomico internazionale |
| International auxiliary language | Lingua ausiliaria internazionale |
| International Auxiliary Language Association | International Auxiliary Language Association |
| international balance | equilibrio internazionale |
| International Bank Account Number | International Bank Account Number |
| International Bank for Reconstruction and Development | Banca Internazionale per la Ricostruzione e lo Sviluppo |
| International Basketball Federation | Federazione Internazionale Pallacanestro |
| International Biathlon Union | International Biathlon Union |
| International Bible Students Association | Studenti della Bibbia |
| International Brigades | Brigate internazionali |
| International Bureau for the Revolutionary Party | Bureau Internazionale per il Partito Rivoluzionario |
| International Bureau of Weights and Measures | Bureau International des Poids et Mesures |
| International Business Machines | IBM |
| International Centre for Theoretical Physics | Centro Internazionale di Fisica Teorica |
| International Civil Aviation Organization | Organizzazione Internazionale dell'Aviazione Civile |
| International Civil Aviation Organization airport code | Codice aeroportuale ICAO |
| international co-operation | cooperazione internazionale |
| International Coalition for the Decade | Coordinamento internazionale per il Decennio |
| International Code of Botanical Nomenclature | Codice Internazionale di Nomenclatura Botanica |
| International Code of Nomenclature of Bacteria | Distinta base |
| International Code of Signals | Codice Internazionale dei Segnali |
| International Color Consortium | International Color Consortium |
| International Cometary Explorer | International Cometary Explorer |
| International Commission on Zoological Nomenclature | Codice Internazionale di Nomenclatura Zoologica |
| International Committee for Weights and Measures | Comité International des Poids et Mesures |
| International Committee of the Fourth International | Quarta Internazionale |
| International Committee of the Red Cross | Comitato Internazionale della Croce Rossa |
| International Communist Current | Corrente Comunista Internazionale |
| international competitiveness | concorrenza internazionale |
| international conflict | conflitto internazionale |
| international convention | convenzione internazionale |
| International Convention for the Safety of Life at Sea | SOLAS |
| International Correspondence Chess Federation | ICCF |
| International Council for Science | International Council for Science |
| International Council of Museums | International Council of Museums |
| International Council on Monuments and Sites | International Council on Monuments and Sites |
| International Court of Justice | Corte Internazionale di Giustizia |
| International Criminal Court | Corte Penale Internazionale |
| International Criminal Tribunal for Rwanda | Tribunale Penale Internazionale per il Ruanda |
| International Cup | Coppa Intercontinentale |
| International Date Line | Linea internazionale del cambio di data |
| International Day for the Eradication of Poverty | Giornata mondiale del rifiuto della miseria |
| international distribution | distribuzione internazionale |
| international division of labour | divisione internazionale del lavoro |
| International draughts | Dama internazionale |
| International Earth Rotation and Reference Systems Service | International Earth Rotation and Reference Systems Service |
| international economic law | diritto internazionale economico |
| International Electrotechnical Commission | Commissione Elettrotecnica Internazionale |
| international environmental relations | relazioni ambientali internazionali |
| International Fairtrade Certification Mark | Commercio equo e solidale |
| International Federation of Library Associations and Institutions | International Federation of Library Associations and Institutions |
| International Federation of Red Cross and Red Crescent Societies | Federazione Internazionale delle Società di Croce Rossa e Mezzaluna Rossa |
| International Finance Corporation | Società finanziaria internazionale |
| International Financial Reporting Standards | International Accounting Standards |
| International Football Association Board | IFAB |
| International for Munich | Monaco di Baviera |
| International Frederick Chopin Piano Competition | Concorso Pianistico Internazionale Frédéric Chopin |
| International Fund for Agricultural Development | Fondo Internazionale per lo Sviluppo Agricolo |
| International Gamers Award | International gamers award |
| International Gothic | Tardo gotico |
| international harmonisation | armonizzazione internazionale |
| International Holocaust Remembrance Day | Giorno della Memoria |
| International Humanist and Ethical Union | Unione Internazionale Etico-Umanistica |
| International humanitarian law | Diritto internazionale umanitario |
| International Labor Organization | Organizzazione Internazionale del Lavoro |
| International Labour | Organizzazione Internazionale del Lavoro |
| International Labour Organization | Organizzazione Internazionale del Lavoro |
| international law | diritto internazionale |
| International Law Commission | Commissione del diritto internazionale |
| International League of non-religious and atheists | IBKA |
| International Lesbian and Gay Association | Ilga |
| International Linear Collider | International Linear Collider |
| International Maritime Organization | Organizzazione Marittima Internazionale |
| International maritime signal flag | Codice Internazionale Nautico |
| International maritime signal flags | Codice Internazionale Nautico |
| International Marxist Tendency | Tendenza Marxista Internazionale |
| International Master | Maestro Internazionale |
| International Mathematical Olympiad | Olimpiadi Internazionali della Matematica |
| International Mathematical Union | Unione Matematica Internazionale |
| International Meridian Conference | Conferenza Internazionale dei Meridiani |
| International Mobile Satellite Organization | Inmarsat |
| International Moneta | Fondo Monetario Internazionale |
| International Monetary Fund | Fondo Monetario Internazionale |
| international Morse code | alfabeto Morse |
| International Music Score Library Project | International Music Score Library Project |
| International Narcotics Control Board | Organo Internazionale per il Controllo degli Stupefacenti |
| International Nomenclature of Cosmetic Ingredients | INCI |
| International Nonproprietary Name | Denominazione comune internazionale |
| International observance | FN |
| International of Anarchist Federations | International of Anarchist Federation |
| International Olympic Committee | Comitato Olimpico Internazionale |
| international organisation | organizzazione internazionale |
| International organization | Organizzazione internazionale |
| International Organization for Migration | Organizzazione Internazionale per le Migrazioni |
| International Organization for Standardization | ISO |
| International Orienteering Federation | Federazione Internazionale di Orientamento |
| International Peace Bureau | Bureau international permanent de la paix |
| International Phonetic Alphabet | alfabeto fonetico internazionale |
| International Phonetic Association | International Phonetic Association |
| International Physicians for the Prevention of Nuclear War | International Physicians for the Prevention of Nuclear War |
| international politics | politica internazionale |
| International Red Aid | Soccorso Rosso Internazionale |
| International Red Cross and Red Crescent Movement | Croce Rossa e Mezzaluna Rossa Internazionale |
| international relations | relazioni internazionali |
| International Rugby Hall of Fame | International Rugby Hall of Fame |
| international safety | sicurezza internazionale |
| International Sailing Federation | ISAF |
| International Science Olympiad | Olimpiadi scientifiche |
| International Scout and Guide Fellowship | International Scout and Guide Fellowship |
| International Security Assistance Force | International Security Assistance Force |
| International Ski Federation | Federazione Internazionale Sci |
| International Society for Krishna Consciousness | Associazione Internazionale per la Coscienza di Kṛṣṇa |
| International Space Station | Stazione Spaziale Internazionale |
| International Standard Audiovisual Number | International Standard Audiovisual Number |
| International Standard Bibliographic Description | International Standard Bibliographic Description |
| International Standard Book Number | Codice ISBN |
| International Standard Classification of Education | ISCED |
| International Standard Classification of Occupations | ISCO |
| International Standard Serial Number | ISSN |
| international standardisation | standardizzazione internazionale |
| International style | Movimento Moderno |
| International Swimming Federation | Fédération Internationale de Natation |
| International System of Units | Sistema internazionale di unità di misura |
| International Tchaikovsky Competition | Concorso Internazionale Čajkovskij |
| International Telecommunication Union | Unione Internazionale delle Telecomunicazioni |
| International Tennis Federation | Federazione Internazionale Tennis |
| International Tennis Hall of Fame | International Tennis Hall of Fame |
| international trade | commercio internazionale |
| international transaction | transazione internazionale |
| International Tribunal for the Law of the Sea | Tribunale Internazionale della Legge del Mare |
| International Truck of the Year | International Truck of the Year |
| International Union of Pure and Applied Chemistry | IUPAC |
| International Union of Railways | Union Internationale des Chemins de Fer |
| International Union of Socialist Youth | International Union of Socialist Youth |
| International Universal Recycling Codes | Codici universali internazionali di riciclaggio |
| international watercourse | corso d'acqua internazionale |
| International Whaling Commission | Commissione internazionale per la caccia alle balene |
| International Workers Association | Asociación Internacional de los Trabajadores |
| International Year of the Child | Anno Internazionale del Bambino |
| International Zetetic Challenge | International Zetetic challenge |
