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

データの先頭[deetanosentou] beginning of data
一頭[ittou] one large animal (horses, cattle, etc.)
一頭立て[ittoudate] one-horse (carriage)
咽頭[intou] pharynx
駅頭[ekitou] station

音頭[ondo] leading a group of people
会頭[kaitou] society president
街頭[gaitou] in the street
核弾頭[kakudantou] nuclear warhead
巻頭[kantou] opening page of book