維持費[ijihi] maintenance costs
運動費[undouhi] campaign fund
加工費[kakouhi] processing cost
会費[kaihi] membership fee
学費[gakuhi] tuition

官費[kanpi] government expense
巨費[kyohi] great cost
共益費[kyouekihi] monthly fee for common areas of an apartment building (lighting, etc.)
教材費[kyouzaihi] teaching material fees
区費[kuhi] ward expenses

御金[okane] money
金糸雀[kinshijaku] canary (esp. the island canary, Serinus canaria)
違約金[iyakukin] penalty for contract breach
一刻千金[ikkokusenkin] every moment is precious
一字千金[ichijisenkin] word of great value

一時金[ichijikin] lump sum
一時賜金[ichijishikin] lump-sum grant
引き金を引く[hikiganewohiku] to pull the trigger
引当金[hikiatekin] reserves
隠れ借金[kakureshakkin] hidden debts