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

犬薄荷[inuhakka] catnip (Nepeta cataria)
愛犬[aiken] pet dog
愛犬家[aikenka] lover of dogs
一犬[ikken] one dog
狂犬[kyouken] mad dog

狂犬病[kyoukenbyou] rabies
軍犬[gunken] war dog
軍用犬[gunyouken] war dog
犬猿の仲[kenennonaka] loggerheads