皆済[kaisai] settlement
完済[kansai] full payment
気が済む[kigasumu] to be satisfied
規模の経済[kibonokeizai] economies of scale
救済[kyuusai] relief

救済策[kyuusaisaku] relief measure
救済者[kyuusaisha] savior
共済[kyousai] mutual aid
共済組合[kyousaikumiai] cooperative society
共同救済基金[kyoudoukyuusaikikin] community chest

皆さん[minasan] all
皆既[kaiki] total eclipse
皆既蝕[kaikishoku] total eclipse (of sun by moon)
皆既日食[kaikinisshoku] total solar eclipse
皆勤[kaikin] perfect attendance

皆済[kaisai] settlement
皆殺し[minagoroshi] massacre
皆無[kaimu] nonexistent
皆目[kaimoku] entirely