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

パチンコ台[pachinkodai] pachinko (Japanese pinball) machine
ワーク取り付け台[waakutoritsukedai] (manufacturing) fixtures
独り舞台[hitoributai] performing solo (by oneself)
一台[ichidai] one machine
縁台[endai] bench

家台[yatai] cart (esp. a food cart)
下台所[shimodaidokoro] servants' kitchen
化粧台[keshoudai] dressing table
架台[kadai] stand
荷台[nidai] (truck) load-carrying tray

円錐[ensui] cone
円錐[marugiri] round gimlet
円錐曲線[ensuikyokusen] conic curve
円錐形[ensuikei] cone
円錐体[ensuitai] cone

角錐[kakusui] pyramid
三角錐[sankakusui] triangular pyramid
円錐台[ensuidai] circular truncated cone
立錐[rissui] setting a drill bit