一昼夜[icchuuya] whole day and night
まっ昼間[mappiruma] broad daylight
真昼[mahiru] midday
昼も夜も[hirumoyorumo] day and night
昼下がり[hirusagari] early afternoon

昼すぎ[hirusugi] just past noon
昼休み[hiruyasumi] lunch break
昼興行[hirukougyou] matinee
昼光色電球[chuukoushokudenkyuu] daylight lamp

加餐[kasan] caring for one's health
午餐[gosan] lunch
午餐会[gosankai] luncheon party
最後の晩餐[saigonobansan] the Last Supper
主の晩餐[shunobansan] the Lord's Supper

正餐[seisan] banquet
聖餐[seisan] Holy Communion
昼餐[chuusan] luncheon
晩餐[bansan] dinner
晩餐会[bansankai] dinner party