Denshi Jisho — Online Japanese dictionary

化す かす to change into; to convert to; to transform; to be reduced; to influence; to improve (someone)
Godan verb with su ending, Intransitive verb 
化す けす to change into; to convert to; to transform; to be reduced; to influence; to improve (someone)
Out-dated or obsolete kana, Godan verb with su ending, Intransitive verb 
化する かする to change into; to convert into; to transform; to be reduced; to influence; to improve (someone)
Suru verb - special class, Suffix 

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