Ni1
symbol
The chemical element nickel.
NI2 
abbreviation
1(In the UK) National Insurance.
2Northern Ireland.
3(In New Zealand) the North Island.
- subnival
- subniveal
- subnivean
- subnormal
- subnormality
- subnormality hospital
- subnotation
- sub-note
- subnotebook
- subnotochordal
- subnuclear
- subnucleus
- subobscure
- subobscurely
- suboccipital
- suboccipital nerve
- suboceanic
- sub-octave
- subocular
- sub-officer
- subopercle
- subopercular
- suboperculiform
- suboperculum
- suboptimal