| 外交 | がいこう | diplomacy |
| 交渉 | こうしょう | negotiations, discussions; connection |
| 交流 | こうりゅう | intercourse, (cultural) exchange, intermingling; alternating current, AC |
| 交換 | こうかん | exchange, interchange, switching, reciprocity, barter, substitution, replacement, clearing (of checks, cheques) |
| 交通 | こうつう | communication, transportation, traffic, intercourse |
| 国交 | こっこう | diplomatic relations |
| 交代 | こうたい | alternation, change, relief, relay, shift, substitution (sports, etc.) |
| 交付 | こうふ | delivering, handing over, furnishing (e.g. with copies), issuance, issuing |
| 外交官 | がいこうかん | diplomat |
| 交通事故 | こうつうじこ | traffic accident |
