恩が有る[ongaaru] to be in one's debt
恩を仇で返す[onwoadadekaesu] to return evil for good
恩愛[onai] kindness and affection
恩給[onkyuu] pension
恩恵[onkei] grace

恩顧[onko] favour
恩師[onshi] one's honoured teacher
恩賜[onshi] Imperial gift
恩赦[onsha] amnesty

温灸[onkyuu] moxa cautery
針灸[shinkyuu] acupuncture and moxibustion
灸治[kyuuji] treatment with moxa
灸点[kyuuten] moxa-treatment points
灸をすえる[kyuuwosueru] to rake over the coals

灸虫[yaitomushi] schizomid (any arachnid of order Schizomida)
鍼灸師[shinkyuushi] acupuncturist and practitioner of moxibustion
灸羽田[yaitohata] malabar grouper (Epinephelus malabaricus)
お灸を据える[okyuuwosueru] to rake over the coals