- night soil
- night terror
- night vision
- night watch
- night watchman
- nightbird
- night-blooming cereus
- nightcap
- nightclothes
- nightclub
- nightcrawler
- nightdress
- nighted
- nightfall
- nightgown
- nighthawk
- nightie
- nightingale
- nightjar
- nightlife
- night-light
- night-line
- nightlong
- nightly
- nightmare
- nightmarish
- nightrider
- night-robe
- nightshade
- nightshirt
- night-sight
- nightspot
- nightstick
- night-stop
- nighttime
- nightwalker
- nightwear
- nightwork
- nigra
- nigrify
- nigroporus
- nigroporus vinosus
- nih
- ni-hard
- ni-hard iron
- nihau
- nihau island
- nihil
- nihil obstat
- nihilism
- nihilist
- nihilistic
- nihilistic delusion
- nihility
- nihon
- nij
- nijinsky
- nijmegen
- nike
- nikita khrushchev
- nikita sergeyevich khrushchev
- nikola tesla
- nikolaas tinbergen
- nikolai andreyevich rimski-korsakov
- nikolai andreyevich rimsky-korsakov
- nikolai ivanovich bukharin
- nikolai ivanovich lobachevsky
- nikolai lenin
- nikolai vasilievich gogol
- nil
- nile
- nile crocodile
- nile river
- nilgai
- nilgiri hills
- nilo-saharan
- nilo-saharan language
- nilotic
- nilotic language
- nilpotent
- nilsson
- nim
- nim tree
- nimble
- nimble will
- nimble-fingered
- nimbleness
- nimblewill
- nimbly
- nimbus
- nimbus cloud
- nimby
- nimiety
- niminy-piminy
- nimitz
- nimravus
- nimrod
- nina
- nina from carolina
- nincompoop
- nine
- nine iron
- nine times
- nine-banded armadillo
- ninefold
- nine-fold
- nine-membered
- ninepence
- ninepenny
- ninepin
- ninepin ball
- ninepins
- niner
- nine-sided
- nine-spot
- nineteen
- nineteenth
- nineteenth amendment
- nineties
- ninetieth
- ninety
- ninety-eight
- ninety-fifth
- ninety-five
- ninety-four
- ninety-nine
- ninety-one
- ninety-seven
- ninety-six
- ninety-three
- ninety-two
- nineveh
- ningal
- ningirsu
- ningishzida
- ninhursag
- ninib
- ninigi
- ninigino-mikoto
- ninja
- ninjitsu
- ninjutsu
- ninkharsag
- ninkhursag
- ninny
- ninon
- nin-sin
- ninth
- ninth cranial nerve
- ninth of ab
- ninth of av
- nintoo
- nintu
- ninurta
- niobe
- niobite
- niobium
- niobrara
- niobrara river
- nip
- nip and tuck
- nip off
- nipa
- nipa fruticans
- nipa palm
- nipper
- nipping
- nipple
- nipple shield
- nippon
- nipponese
- nippy
- nipr
- niqaabi
- niqab
- ni-resist
- ni-resist iron
- nirvana
- nisan
- nisei
- nisi
- nissan
- nissen hut
- nist
- nisus
- nit
- nitella
- niter
- nitid
- nitpick
- nitpicker
- nitramine
- nitrate
- nitrate bacterium
- nitrazepam
- nitre
- nitric
- nitric acid
- nitric bacteria
- nitric bacterium