汚濁[odaku] pollution
溷濁[kondaku] turbidity
清濁[seidaku] good and evil
濁す[nigosu] to make muddy (a liquid)
濁り[nigori] muddiness

濁り点[nigoriten] voiced consonant marks
濁る[nigoru] to become muddy
濁音[dakuon] sonant
濁点[dakuten] voiced consonant marks (nigori)
濁流[dakuryuu] muddy stream

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