恩恵【おんけい】
grace, favor, favour, blessing, benefit
恩赦【おんしゃ】
amnesty, pardon
恩【おん】
favour, favor, obligation, debt of gratitude
恩返し【おんがえし】
requital of a favour (favor), repayment (of an obligation, kindness, etc.)
恩賜【おんし】
Imperial gift
恩給【おんきゅう】
pension (esp. public servant's), a lord giving a land holding to a vassal
恩人【おんじん】
benefactor, patron, person to whom one owes a great deal, person to whom one is (deeply) indebted