お大事に[odaijini] take care of yourself
暗黒大陸[ankokutairiku] Dark Continent (i.e. Africa)
伊勢大神宮[isedaijinguu] the Grand Shrines of Ise
伊勢大廟[isetaibyou] the Grand Shrines of Ise
偉大[idai] greatness

医科大学[ikadaigaku] medical school
医大[idai] medical university
井の中の蛙大海を知らず[inonakanokawazutaikaiwoshirazu] parochial
一大[ichidai] one large ...
一大事[ichidaiji] serious affair

空オケ[karaoke] karaoke (singing to taped accompaniment)
ベクトル空間[bekutorukuukan] vector space
茜さす空[akanesasusora] glowing sky
圧搾空気[assakukuuki] compressed air
圧縮空気[asshukukuuki] compressed air

位相空間[isoukuukan] phase space (physics)
宇宙空間[uchuukuukan] outer space
雨空[amazora] rainy sky
英国航空[eikokukoukuu] British Airways
仮想空間[kasoukuukan] virtual space (e.g. in computer graphics)

運航[unkou] operating (e.g. ships, aircraft)
えい航[eikou] towing (a ship)
英国航空[eikokukoukuu] British Airways
往航[oukou] outward voyage
廻航[kaikou] navigation

寄航[kikou] stopping at a port
休航[kyuukou] suspension of sailings
近接航空支援[kinsetsukoukuushien] close air support
欠航[kekkou] flight cancellation
航宇[kouu] aerospace

韓国[kankoku] (South) Korea
韓国語[kankokugo] Korean (language)
韓国人[kankokujin] Korean person
韓人[kanjin] Korean person
在韓米軍[zaikanbeigun] US troops stationed in (South) Korean

三韓[sankan] Korea
新韓国党[shinkankokutou] New Korea Party
大韓航空[taikankoukuu] Korean Airways
日中韓[nicchuukan] Chinese, Japanese and Korean (usu. characters, etc.)
日中韓越[nicchuukanetsu] Chinese, Japanese, Korean and Vietnamese (usu. characters)