- new flower
- nephrocalcinosis
- nephrolithotomy
- nodal rhythm
- new york bay
- new england
- new england boiled dinner
- nontouch technique
- northern ireland
- northern hemisphere
- nephrography
- necrotizing enterocolitis
- normal tension glaucoma
- not that
- neurectopia
- neuraxitis
- nephremphraxis
- narcoterrorism
- neutron_deficient nuclide
- noncritical
- noncyclical
- nitrogenase
- noncoding DNA
- negative chemotaxis
- nonsurgical biopsy
- non_governmental
- nonglycosuric melituria
- night soil trench
- nonpolarisation block
- neoanthropic
- nyx
- nuxvomica seed
- northern bobwhite
- newfoundland and labrador
- not to allow to speak freely
- no other one
- noonan's syndrome
- needlessly
- nothings
- needle furze
- nidor
- neoglucogenesis
- neohygrophorus angelesianus
- neosho
- Newton's third law
- Newton's second law of motion
- Newton's first law of motion
- Newton's second law
- Newton's first law
- Neopolitan