偉才[isai] genius
何才[nansai] how old?
画才[gasai] artistic talent
鬼才[kisai] wizard
賢才[kensai] man of ability

口才[kousai] clever speech
才覚[saikaku] ready wit
才学[saigaku] talent and education
才幹[saikan] ability
才器[saiki] talent

才槌[saizuchi] small wooden mallet
才槌頭[saizuchiatama] head like a hammer
相槌[aizuchi] sounds given during a conversation to indicate comprehension
相槌を打つ[aizuchiwoutsu] to throw in appropriate words in a conversation
金槌頭[kanazuchiatama] hard-headed

小槌[kozuchi] (small) mallet
打ち出の小槌[uchidenokozuchi] figurative magic wand
鉄槌[kanazuchi] (iron) hammer
木槌[kizuchi] wooden hammer

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