Denshi Jisho — Online Japanese dictionary

1: ogre; demon;
2: spirit of a deceased person;
3: Chinese "ghost" constellation (one of the 28 mansions)
Noun 
おに 1: ogre; demon;
2: spirit of a deceased person;
3: ogre-like person (i.e. fierce, relentless, merciless, etc.);
4: it (i.e. in a game of tag)
Common word, Noun 
がき 1: (Usually written using kana alone) brat; kids;
2: (Buddhist term) preta (hungry ghost); ghoul
Noun 
きき ghastly; dreadful
Noun 
きび demon; monster; apparition
Noun 
きさい wizard; genius; great talent
Common word, Noun 
きしん fierce god
Common word, Noun, No-adjective 
きじん fierce god
Common word, Noun, No-adjective 
あっき evil spirit; demon; devil
Noun 
えきき gods or demons that cause epidemics
Noun 
おにご child born with teeth; child which does not resemble its parents
Noun 
おにば protruding tooth (like a fang)
Noun 
おにび will-o'-the-wisp; jack-o'-lantern
Noun 
きこく wailings of a restless ghost
Noun, Archaism 
きじょ demoness; witch; ogress; she-devil
Noun 
きせき roster of the dead
Noun 
きたい 1: anxiety; concern; (secret) fear;
2: (hydatidiform) mole
Noun 
きちく brute
Noun 
きめん mask of a devil; startling appearance; devil's face
Noun 
きもん the northeastern (unlucky) direction; person or thing to be avoided
Noun 
けんき devilish swordsman
Noun 
こおに imp; elf; pixie; goblin; devilkin
Noun 
さいき cruel creditor; bill collector
Noun 
じゃき devil; imp; evil spirit
Noun 
ゆうき ghost; revenant; spirit (of the dead); departed soul
Noun 
施餓 せがき service for the benefit of suffering spirits
Noun, Buddhist term 
あおおに (horned) blue demon; blue ogre
Noun 
おにいた wooden board used on the ridge-ends of a roof instead of an onigawara tile (sometimes covered in copper sheeting)
Noun 
おにがみ fierce god
Noun, No-adjective 
おにばす prickly water lily
Noun 

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