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

悪銭[akusen] ill-gotten money
一紙半銭[isshihansen] small sum
金銭[kinsen] money
金銭的ダメージ[kinsentekidameeji] monetary damages
古銭[kosen] old coin

古銭学[kosengaku] numismatics
口銭[kousen] commission
自動金銭出入機[jidoukinsenshutsunyuuki] automatic teller machine
借銭[shakusen] debt
守銭奴[shusendo] miser