一円[ichien] one yen
一円玉[ichiendama] one-yen coin
一円札[ichiensatsu] one-yen bill
円か[madoka] round
円やか[maroyaka] round

円グラフ[engurafu] pie graph
円安[enyasu] cheap yen
円為替[engawase] yen exchange
円域[eniki] yen bloc

円罐[marugama] cylindrical boiler
罐詰[kanzume] packing (in cans)
藥罐[yakan] kettle
薬罐頭[yakanatama] bald head

汽罐[kikan] boiler
罐焚き[kamataki] stoker
薬罐をかける[yakanwokakeru] to put a kettle on (the stove)