- Nin Tung Lam
- nint zeta-function
- Ninwu Wannian Bingdong
- Ninɡjiɑnɡ Qu
- niobate
- Niobe
- Niobid Painter
- niobite
- niobium
- niobium aluminum superconductor
- niobium carbide
- niobium compounds
- niobium material for superconducting application
- niobium metallurgy
- niobium oxide
- niobium powder
- niobium products
- niobium single crystal
- niobium tantalum ore concentration
- niobium tin superconductor
- niobium titanium superconductor
- niobium wire
- Niobrara tight oil
- Niobē
- NIOC