円借款[enshakkan] international yen loan
仮定款[kariteikan] provisional articles
交款[koukan] exchange of courtesies (cordialities)
借款[shakkan] (international) loan
長期借款[choukishakkan] long-term loan

定款[teikan] articles of incorporation
款冬[fuki] giant butterbur (Petasites japonicus)
約款[yakkan] agreement
落款[rakkan] sign and seal
款冬[yamabuki] kerria (Kerria japonica)

安全保障条約[anzenhoshoujouyaku] US-Japan Security Treaty
違約[iyaku] breach of contract
違約金[iyakukin] penalty for contract breach
一粒子既約[ichiryuushikiyaku] one particle irreducible (physics)
化学兵器禁止条約[kagakuheikikinshijouyaku] chemical weapons ban treaty

仮条約[karijouyaku] provisional treaty
会う約束[auyakusoku] rendezvous
会員規約[kaiinkiyaku] membership agreement (e.g. for a credit card)
解約[kaiyaku] cancellation of contract
確約[kakuyaku] firm promise