Denshi Jisho — Online Japanese dictionary

おんわ gentle; mild; moderate
Common word, Na-adjective, Noun 
おんけん quiet; dependable; uniform; (politically) moderate
Common word, Na-adjective, Noun 
おんとう proper; reasonable; right
Common word, Na-adjective, Noun 
便 おんびん gentle; peaceable; quiet
Common word, Na-adjective, Noun 
やか おだやか calm; gentle; quiet
Common word, Na-adjective, Noun 
健派 おんけんは moderate faction; moderates
Noun 
健路線 おんけんろせん moderate line; middle-of-the-road line (in politics)
Noun 
やかに話す おだやかにはなす to talk quietly
Expression, Godan verb with su ending 

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