ちょっと一杯[chottoippai] let's have a quick drink
ばつ一[batsuichi] being once divorced
一向[hitaburu] nothing but
サラダ一皿[saradahitosara] plate of salad

安全第一[anzendaiichi] safety first
一か八か[ichikabachika] sink or swim
一っ走り[hitoppashiri] spin (as in 'take a car for a spin')
一つ一つ[hitotsuhitotsu] one-by-one

牽く[hiku] to pull
牽引[kenin] hauling
牽引車[keninsha] tractor
牽引力[keninryoku] pulling power
牽強[kenkyou] distortion of facts

牽強付会[kenkyoufukai] farfetched (argument, opinion)
牽制[kensei] check
牽制球[kenseikyuu] throw to check a runner
牽束[kensoku] restraint
牽連[kenren] related to

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