• 門戸もんこ — gateway / door (often metaphorical)
• 戸惑とまどう — to be bewildered / to be puzzled
• 戸口とぐち — doorway / entrance
• 戸棚とだな — cupboard / cabinet
• 戸数こすう — number of households
• 雨戸あまど — storm shutter
• 戸籍こせき — family register
• 一戸建いっこだて — detached house
• 戸締とじまり — locking up / securing doors

The kanji 戸 shows the side of a door or shutter, symbolizing an entrance. It’s one of the oldest kanji for physical structures and is still used in everyday household words.

戸とを開あけてください。
Please open the door.

雨戸あまどを閉しめました。
I closed the storm shutters.