外交【がいこう】
diplomacy, selling (e.g. door-to-door), canvassing
交渉【こうしょう】
negotiations, bargaining, discussions, talks, connection, relationship, relations, dealings
交流【こうりゅう】
exchange (e.g. cultural), interchange, interaction, mingling, mixing, coming together, 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】
traffic, transportation, communication, exchange (of ideas, etc.), intercourse
国交【こっこう】
diplomatic relations
交代【こうたい】
alternation, change, relief, relay, shift, substitution (sports, etc.), taking turns
交付【こうふ】
delivery, issuance, handing over, granting
交通事故【こうつうじこ】
traffic accident
外交官【がいこうかん】
diplomat
交際【こうさい】
company, friendship, association, society, acquaintance, (romantic) involvement, dating
交響曲【こうきょうきょく】
symphony
交差点【こうさてん】
crossing, intersection
交互【こうご】
alternate, alternating, mutual, reciprocal
交わす【かわす】
to exchange (messages, greetings, arguments, etc.), to intersect, to cross, to interlace, ... with one another, ... to each other
交響楽【こうきょうがく】
symphony (orchestra)
交通費【こうつうひ】
traveling expenses, travelling expenses, carfare
交戦【こうせん】
war, battle, hostilities
交える【まじえる】
to mix, to combine, to include, to exchange (words, fire, etc.), to cross (e.g. swords), to join together
交易【こうえき】
trade, commerce