Denshi Jisho — Online Japanese dictionary

確 かく certain; definite
Taru-adjective, Adverb taking the 'to' particle 
確 しか certainly (for certain) (used in negative sense)
Adverb taking the 'to' particle, Usually written using kana alone, Obscure term, Archaism 
確 たしか 1: certain; sure; definite;
2: (Adverb) if I'm not mistaken; if I remember correctly
Expression, Noun, Na-adjective 
正確 せいかく accurate; punctual; exact; authentic; veracious
Common word, Na-adjective, Noun 
的確 てきかく precise; accurate
Common word, Na-adjective, Noun 
適確 てきかく precise; accurate
Common word, Na-adjective, Noun 
的確 てっかく precise; accurate
Common word, Na-adjective, Noun 
適確 てっかく precise; accurate
Common word, Na-adjective, Noun 
当確 とうかく projected to win; sure to be elected; home free
Common word, Noun, Abbreviation 
明確 めいかく clear; precise; definite; distinct
Common word, Na-adjective 
精確 せいかく detailed and accurate; exhaustive and precise; meticulous; finely detailed
Na-adjective, Noun 
不正確 ふせいかく uncertainty; inaccuracy
Na-adjective, Noun 
不明確 ふめいかく inaccurate; indistinct; imprecise; unclear; indecisive
Na-adjective, Noun 
当選当確 とうせんとうかく candidates (in an election) who have won or are projected to be elected
Noun 

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