- N-acetyl-L-cysteine
- N-acetylcysteine
- N-acetyldinaline
- N-benzoyl-staurosporine
- N-butyl-N-(4-hydroxybutyl) nitrosamine
- NaCl
- naloxone
- naltrexone
- nanogram
- nanometer
- nanomole
- nanoparticle
- nanoparticle paclitaxel
- nanoprobe
- nanotechnology
- narcotic
- nasal
- nasogastric
- nasogastric tube
- Nasonex
- nasopharyngeal cancer
- nasopharynx
- nasoscope
- nasoscopy
- National Cancer Institute