• northpole,
• portol,
• worthile,
• porole,
• portale,
• portose,
• oorthole,
• lorthole,
• -orthole,
• portholle,
• prthole,
• porhole,
• portole,
• portholee,
• port hole,
• orthdome,
• portmotte,
• portsalee,
• Portsele,
• Porgigle

• portela,
• Portley,
• portell,
• Portlock,
• portales,
• portal.

The adjective form of the word "porthole" is "portholed".

The plural of the "porthole" can be the "portholes".

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