Denshi Jisho — Online Japanese dictionary

溝 こう 10^32; hundred nonillion (American); (Obsolete term) hundred quintillion (British)
Noun, Obscure term 
爻 こう yao (line representing yin or yang that comprises one third of a trigram)
Noun 
硬 こう hardness
Noun 
紅 こう deep red; crimson
Noun 
綱 こう (biological) class
Noun 
考 こう 1: thought;
2: (Noun suffix) report on one's investigation into ...;
3: deceased father
Noun 
薨 こう death (of a nobleman, etc.)
Noun 
蝗 こう 1: (Usually written using kana alone) rice grasshopper (of genus Oxya);
2: grasshopper; locust (of family Catantopidae)
Noun 
行 こう 1: going; travelling (traveling);
2: type of classical Chinese verse (usu. an epic);
3:
4: (Archaism) district (of similar merchants); guild; () bank
Noun, Noun suffix 
講 こう 1: (Buddhist) lecture meeting;
2: religious association;
3: mutual assistance association (i.e. for financial assistance)
Noun, Noun suffix 
貢 こう tribute
Noun 
鋼 こう steel
Noun 
項 こう 1: clause; paragraph; item;
2: (Linguistic term) argument;
3: (Mathematical term) term;
4: (Archaism) nape (of the neck)
Noun 
香 こう incense
Noun 
高 こう 1:
2: (Abbreviation) High (abbreviation of "High School" following a school's name); (Prefix) high-
Suffix 
鸛 こう stork (esp. the Oriental stork, Ciconia boyciana)
Noun, Usually written using kana alone 
紅 もみ red silk lining
Noun 
請う こう to beg; to ask; to request; to invite
Common word, Godan verb with u ending (special class), Transitive verb 
乞う こう to beg; to ask; to request; to invite
Godan verb with u ending (special class), Transitive verb 
恋う こう to love
Godan verb with u ending (special class), Transitive verb 
斯う こう 1:
2: (Usually written using kana alone) in this way (used for something or someone close to the speaker, including the speaker himself, or for the opinions of the speaker); thus; such; (Interjection) uh... (interjection used as a verbal pause)
Adverb 
長官 こう director (highest of the four administrative positions of the ritsuryo period); chief
Noun, No-adjective, Archaism 
コウゾ hybrid mulberry tree used to make Japanese paper (Broussonetia kazinoki x papyrifera)
Noun, Usually written using kana alone 
麹 こうじ mould grown on rice, etc. as a starter to make sake (mold)
Common word, Noun 
糀 こうじ mould grown on rice, etc. as a starter to make sake (mold)
Noun 
楮 こうぞ hybrid mulberry tree used to make Japanese paper (Broussonetia kazinoki x papyrifera)
Noun, Usually written using kana alone 

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