Denshi Jisho — Online Japanese dictionary

曠野 あらの wasteland; wilderness; deserted land; prairie; vast plain; wilds; desert; wild land
Irregular kanji usage, Noun 
曠古 こうこ historic; unprecedented
Noun, No-adjective 
曠野 こうや wasteland; wilderness; deserted land; prairie; vast plain; wilds; desert; wild land
Irregular kanji usage, Noun 
曠原 こうげん wide plain or field
Noun 
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 
曠世 こうせい unparalleled; unparallelled; matchless
Noun, No-adjective 
曠然 こうぜん wide open (as in land); vast
Taru-adjective, Adverb taking the 'to' particle 
明らか あきらか obvious; evident; clear; plain
Common word, Na-adjective, Noun 
曠職 こうしょく neglect of official duty
Noun 
明らかにする あきらかにする to make clear; to clarify; to disclose; to make public
Expression, Suru verb - irregular 
明らかになる あきらかになる 1: to become clear;
2: to be made public
Expression, Godan verb with ru ending 

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