• bightcap,
• mightcap,
• jightcap,
• hightcap,
• nughtcap,
• njghtcap,
• nkghtcap,
• noghtcap,
• n9ghtcap,
• n8ghtcap,
• nightcal,
• nightcapo,
• nightcapl,
• nightcapp,
• night cap,
• nightwach,
• night-capp,
• lightral,
• Kightlae,
• nightcab

• nightclub,
• nightspot,
• nightshirt,
• night-stop,
• night game,
• nightshade,
• nightjar.

The adjective form of the word "nightcap" is "nightcapped".

The plural of the "nightcap" can be the "nightcaps".

The singular of the "nightcap" can be the "nightcap".