Denshi Jisho — Online Japanese dictionary

抗元 こうげん antigen
Noun 
抗言 こうげん protest
Noun, Suru verb 
曠原 こうげん wide plain or field
Noun 
荒原 こうげん wilderness
Noun 
高言 こうげん boasting; bragging; talking big
Noun, Suru verb 
交媾 こうこう sexual union
Noun, Suru verb 
公侯 こうこう princes and marquises; great feudal lords
Noun 
口腔 こうこう the oral cavity; mouth cavity
Noun, No-adjective 
坑口 こうこう pithead; minehead
Noun 
広々 こうこう extensive; spacious
Taru-adjective, Adverb taking the 'to' particle, Archaism 
広広 こうこう extensive; spacious
Taru-adjective, Adverb taking the 'to' particle, Archaism 
後攻 こうこう (baseball) taking the field first, thus batting second
Noun, Suru verb 
後項 こうこう following or later or last clause or article, etc.
Noun 
晃々 こうこう brilliant; dazzling; light; bright
Taru-adjective, Adverb taking the 'to' particle 
晃晃 こうこう brilliant; dazzling; light; bright
Taru-adjective, Adverb taking the 'to' particle 
曠々 こうこう extensive; spacious
Taru-adjective, Adverb taking the 'to' particle, Archaism 
曠曠 こうこう extensive; spacious
Taru-adjective, Adverb taking the 'to' particle, Archaism 
洸々 こうこう valiant; brave; surge (of water)
Noun 
洸洸 こうこう valiant; brave; surge (of water)
Noun 
港口 こうこう harbor entrance; harbour entrance
Noun 
煌々 こうこう brilliant; dazzling; light; bright
Taru-adjective, Adverb taking the 'to' particle 
煌煌 こうこう brilliant; dazzling; light; bright
Taru-adjective, Adverb taking the 'to' particle 
皇考 こうこう the (deceased) father of the current emperor
Noun 
皎々 こうこう 1: bright (esp. of the moon);
2: broad and empty
Taru-adjective, Adverb taking the 'to' particle 
皎皎 こうこう 1: bright (esp. of the moon);
2: broad and empty
Taru-adjective, Adverb taking the 'to' particle 
皓々 こうこう 1: bright (esp. of the moon);
2: broad and empty
Taru-adjective, Adverb taking the 'to' particle 

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