一丸[ichigan] lump
丸柱[marubashira] column
丸盆[marubon] round tray
丸っこい[marukkoi] round
丸っ切り[marukkiri] completely

丸で[marude] quite
丸味[marumi] roundness
丸める[marumeru] to make round
丸め込む[marumekomu] to coax

円窓[marumado] round window
格子窓[koushimado] latticed window
丸窓[marumado] circular window
車窓[shasou] train window
出窓[demado] bay window

切り窓[kirimado] windows cut out of a wall
窓ごし[madogoshi] viewing through a window
窓口[madoguchi] ticket window
窓際[madogiwa] (at the) window