恩返し【おんがえし】
requital of a favour (favor), repayment (of an obligation, kindness, etc.)
命の恩人【いのちのおんじん】
lifesaver, person who saved one's life
恩人【おんじん】
benefactor, patron, person to whom one owes a great deal, person to whom one is (deeply) indebted
恩恵【おんけい】
grace, favor, favour, blessing, benefit
恩給【おんきゅう】
pension (esp. public servant's), a lord giving a land holding to a vassal
恩賜【おんし】
Imperial gift
恩赦【おんしゃ】
amnesty, pardon
恩師【おんし】
teacher (to whom one owes a debt of gratitude), mentor, one's former teacher
恩義【おんぎ】
obligation, favour, favor, debt of gratitude
恩典【おんてん】
favour, favor, act of grace, special privilege
謝恩会【しゃおんかい】
thank-you party