subway /subˈwā/

1. A tunnel for pedestrians
2. An underground passage for water pipes, gas-pipes, sewers, etc
3. An underground railway

• niffered
• niffering
• niffers
• niffier
• niffiest
• niffing
• niffnaff
• niffnaffed
• niffnaffing
• niffnaffs
• niff-naffy
• niffs
• niffy
• niffy-naffy
• Niflheim
• niftier
• niftiest
• niftily
• niftiness
• niftinesses
• nifty
• nigella
• nigellas
• niger
• Nigerian