- Niemen
- Niemeyer
- Niemoeller
- Niemöller
- Niepce
- Nier
- Nierstein
- Niersteiner
- Nietzsche
- Nietzsche, Friedrich
- Nietzscheism
- nieve
- Nièvre
- nife
- nifedipine
- niff
- Niflheim
- nifty
- Nigel
- nigella
- Niger
- Niger-Congo
- Nigeria
- Nigerian
- Niger-Kordofanian
- Niger seed
- nigga
- niggard
- niggardly
- nigger
- nigger heaven
- niggle
- niggling
- nigh
- night
- night and day
- night blindness
- night-blooming cereus
- night bolt
- nightcap
- nightclothes
- nightclub
- night coach
- night court
- night crawler
- night dancer
- nightdress
- night editor
- nightfall
- night fighter
- nightglow
- nightgown
- nighthawk
- night heron
- nightie
- nightingale
- Nightingale
- Nightingale, Florence
- Nightingale ward
- nightjar
- night jasmine
- Night Journey
- night key
- night latch
- night letter
- nightlife
- night-light
- night lizard
- nightlong
- nightly
- nightmare
- nightmarish
- night monkey
- night-night
- night nurse
- night office
- night owl
- night person
- night raven
- nightrider
- night robe
- nights
- night safe
- nightscape
- night school
- nightshade
- nightshade family
- night shift
- nightshirt
- nightside
- night-sky light
- night snake
- night soil
- nightspot
- nightstand
- night stick
- night sweats
- night table
- night terror
- night terrors
- nighttide
- nighttime
- night-time
- night vision
- nightwalker
- night watch
- Night Watch, The
- night watchman
- nightwear
- nighty
- nighty-night
- nigiri
- nigrescent
- nigrify
- nigritude
- nigrosine
- NIH
- NIHE
- nihil
- nihilism
- Nihilism
- nihilistic
- nihility
- nihil obstat
- Nihon
- nihonium
- NII
- Niigata
- Niihau
- Nijinsky
- Nijinsky, Vaslav
- Nijmegen
- Nikaria
- nikau
- Nike
- Nike Hercules
- Nikkei
- Nikkei Stock Average
- Nikko
- Nikko fir
- nikkud
- Nikky
- Nikolainkaupunki
- Nikolaus von Cusa
- Nikolayev
- Nikon
- Nikopol
- niksen
- nil
- NIL
- nil admirari
- nil desperandum
- Nile
- Nile blue
- Nile crocodile
- Nile green
- Nile River
- Niles
- Nile Valley
- nilgai
- Nilgiri Hills
- nill
- Nilometer
- Nilópolis
- Nilo-Saharan
- Nilote
- Nilotic
- Nilotic crocodile
- nilpotent
- nil return
- nil sine numine
- Nilsson
- nim
- nimble
- nimblewit
- nimbly
- nimbo-
- nimbostratus
- nimbus
- nimbus clouds
- NIMBY
- nimbyism
- Nimeiry
- Nîmes
- NIMH
- nimiety
- niminy-piminy
- Nimitz
- Nimitz, Admiral Chester
- nimonic alloy
- nimps
- Nimrod
- Nimrud
- nim tree
- Nimwegen
- Nimzowitsch
- Nin
- Nina
- niña
- Niña
- nincompoop
- nine
- nine ball
- nine-banded armadillo
- ninebark
- nine days' wonder
- nine-days wonder
- nine-eleven
- ninefold
- ninepence
- ninepenny
- ninepins
- nine plus two array
- nine plus zero array
- niner
- nine-spot
- nineteen
- Nineteen Eighty-Four
- nineteenth
- Nineteenth Amendment
- nineteenth hole
- nineteenth man
- ninetieth
- nine-to-five
- Ninette
- ninety
- ninety-day wonder
- ninety-eight
- ninety-eighth
- ninety-fifth
- ninety-first
- ninety-five
- Ninety-Five Theses
- ninety-four
- ninety-fourth
- ninety-nine
- ninety-ninth
- ninety-one
- ninety-second
- ninety-seven
- ninety-seventh
- ninety-six
- ninety-sixth
- ninety-third
- ninety-three
- ninety-two
- Nineveh
- Ninevite
- Nine Worthies
- Ningbo
- Ningsia
- Ningxia
- Ningxia Hui
- Ningxia Hui Autonomous Region
- ninhydrin
- Ninian
- Ninib
- Ninigi
- ninja
- ninja loan
- ninjutsu
- ninny
- ninnyhammer
- niño
- Niño
- ninon
- Nintendo
- ninth
- Ninth Amendment
- ninth chord
- Ninth Commandment
- Ninth Symphony
- Ninurta
- Ninus
- niobate
- Niobe
- niobic
- niobic acid
- Niobid
- niobite
- niobium
- niobous
- Niobrara
- Niort
- Nios
- NIOSH
- nip
- Nip
- nipa
- nip and tuck
- nip curn
- Nipigon
- nip in the bud
- Nipissing
- Nipmuck
- nipper
- nippers
- nipping
- nipple
- nipplewort
