劈く[tsunzaku] to break
劈開[hekikai] cleavage (in gems)
劈頭[hekitou] outset

開巻劈頭[kaikanhekitou] at the very beginning of a book
劈頭第一[hekitoudaiichi] at the outset

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