- 最高【さいこう】 - best, supreme, wonderful, finest, highest, maximum, most, uppermost, supreme 
- 高い【たかい】 - high, tall, expensive, high-priced, high (level), above average (in degree, quality, etc.), loud, high-pitched, shrill 
- 高校【こうこう】 - senior high school, high school 
- 高級【こうきゅう】 - high-class, high-grade, high-quality, high-end, luxury, high-ranking, high-level, senior 
- 高校生【こうこうせい】 - senior high school student 
- 高度【こうど】 - altitude, height, elevation, high-degree, high-grade, advanced, sophisticated, strong 
- 高まる【たかまる】 - to rise, to swell, to be promoted 
- 高める【たかめる】 - to raise, to lift, to boost, to enhance 
- 高速【こうそく】 - high-speed, rapid, express, highway, freeway, expressway, motorway 
- 高価【こうか】 - highly priced, expensive, valuable, costly 
- 高木【こうぼく】 - tall tree 
- 女子高生【じょしこうせい】 - female high school student 
- 高麗【こうらい】 - Goryeo (dynasty of Korea; 918-1392 CE), Korea (esp. the Goguryeo kingdom or the Goryeo dynasty), (stone) guardian lion-dogs at Shinto shrine 
- 円高【えんだか】 - appreciation of the yen, strong yen 
- 高齢【こうれい】 - advanced age, old age 
- 高さ【たかさ】 - height, altitude, elevation, level, altitude, height 
- 高層【こうそう】 - high-rise (building), multistory, multistoried, tall, high (altitude), upper (atmosphere, air current, etc.) 
- 高等【こうとう】 - high class, high grade 
- 高速道路【こうそくどうろ】 - highway, freeway, expressway, motorway 
- 残高【ざんだか】 - (bank) balance, remainder