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

ハッブル望遠鏡[habburubouenkyou] Hubble telescope
胃鏡[ikyou] gastroscope
遠眼鏡[toomegane] spectacles for far-sightedness
凹眼鏡[ougankyou] concave glasses
凹面鏡[oumenkyou] concave mirror

鏡像[kyouzou] reflected image
鏡台[kyoudai] dresser
鏡板[kagamiita] panel
鏡面[kyoumen] mirror surface