- Night-blooming
- Night-watchman
- Nightlong
- Nile
- Nimble
- Nimble-fingered
- Nimbo-stratus
- Nine apertures
- Nineish
- Nineteenth
- Ninety
- Niobium
- Nippon
- Nisumbha
- Nitric
- Nitro genetic
- Nitrogen
- Nitrous oxide
- Nitty-gritty
- Nitwit
- Nlq
- No go
- No good
- No joke
- No laughing matter
- No love lost
- No sweat
- No thanks to
- No whit
- No-op
- Noble bearing
- Noble birth
- Noble-minded
- Noblest
- Nobody
- Nocturne
- Noesis
- Noetic
- Noir
- Noiseless
- Noisily
- Nomadically
- Nominate
- Nomination
- Non living
- Non volatile storage
- Non-aligned
- Non-alignment
- Non-contributory
- Non-factual
- Non-fiction
- Non-impact printers
- Non-interference
- Non-profit
- Non-proliferation
- Non-renewable
- Non-smoking
- Non-standard
- Non-stick
- Non-stop
- Non-union
- Non-white
- Nonattendance
- Nonchalance
- Nonchalant
- Nonconductor
- Nonpareil
- Nonplussed
- Nonprofessional
- Nonsensically
- Nonvenomous
- Nonwoven
- Noodle
- Nook
- Noon and evening
- Noose
- Nor yet
- Normal
- Normality
- Normalization
- Normalize
- Norman
- Normatively
- Norse
- North-east
- North-east direction
- North-westward
- Northern
- Northern wind
- Northward
- Northwardly
- Northwards
- Nosal sound
- Nose ornament
- Nose-ring
- Nosey
- Nosocomial
- Nostalgic
- Nosy
- Not fluent-speaking