| International Year of Astronomy year | 36 |
| International writers' org. with appropriate initials | 57 |
| International writers' org. | 31 |
| International Workingmen's Association organizer | 52 |
| International waters | 20 |
| International Washington neighborhood | 37 |
| International understandings | 28 |
| International understanding | 27 |
| International U.K. music fest | 29 |
| International treaty | 20 |
| International treaties | 22 |
| International traveler's permit | 35 |
| International traveler's need | 33 |
| International traveler's concern | 36 |
| International travel guide publisher | 36 |
| International trade spot | 24 |
| International trade place | 25 |
| International thaw | 18 |
| International terminal document | 31 |
| International Tennis Hall-of-Famer Nastase | 42 |
| International Tennis Hall of Famer who won consecutive US Opens in 1997 and 1998 | 80 |
| International Tennis Hall of Fame's Gibson | 46 |
| International Tennis Hall of Fame inductee, 2004 | 48 |
| International Tennis Hall of Fame inductee the same year as Guillermo | 69 |
| International Tennis Hall of Fame inductee | 42 |
| International tank option | 25 |
| International Talk Like a Pirate Day mo. | 40 |
| International syndicate | 23 |
| International Style architect Aalto | 35 |
| International streaker | 22 |
| International standardized measurement promotion that may get more attention next year, since it's held on 10/10/10 | 119 |
| International sporting event | 28 |
| International Space Station predecessor | 39 |
| International Space Station precursor | 37 |
| International society | 21 |
| International show | 18 |
| International shoe company | 26 |
| International shoe brand | 24 |
| International service club | 26 |
| International retailer whose name is an acronym | 47 |
| International resort brand | 26 |
| International Reply Coupon rel. | 31 |
| International relief org. | 25 |
| International relaxation | 24 |
| International Red Cross, e.g.: Abbr. | 36 |
| International race | 18 |
| International Q&A magazine? | 31 |
| International precedent | 23 |
| International powerhouse in cricket | 35 |
| International poverty fighter | 29 |
| International peacekeeping grp. | 31 |
| International pageant competitor | 32 |
| International pacts | 19 |
| International org. with 195 members | 35 |
| International org. | 18 |
| International Olympics chief Jacques | 36 |
| International oil cartel | 24 |
| International oil and gas giant, informally | 43 |
| International news topics | 25 |
| International news service | 26 |
| International Museum of Cartoon Art founder, 1974 | 49 |
| International Motorsports Hall of Fame location | 47 |
| International money | 19 |
| International monetary unit | 27 |
| International monetary org. | 27 |
| International merchant | 22 |
| International Masturbation Month | 32 |
| International magazine founded in France in 1945 | 48 |
| International League letters | 28 |
| International language system | 29 |
| International lang. | 19 |
| International labour org, | 25 |
| International ID | 16 |
| International hold-up man? | 26 |
| International Harvester vehicle maker | 37 |
| International grp. since 1948 | 29 |
| International group annulled restraint | 38 |
| International golf competition | 30 |
| International goal | 18 |
| International gas brand | 23 |
| International furniture retailer | 32 |
| International friendship | 24 |
| International food company based in Paris | 41 |
| International finance coalition | 31 |
| International fashion magazine | 30 |
| International event | 19 |
| International easings | 21 |
| International easing of tensions | 32 |
| International easing of discord | 31 |
| International Drum mo. | 22 |
| International document | 22 |
| International distress sig. | 27 |
| International defense org. | 26 |
| International defense grp. | 26 |
| International dealer | 20 |
| International Day of the Girl Child org. | 40 |
| International cricket match | 27 |
| International cricket event | 27 |
| International cricket competition | 33 |
| International credit source | 27 |