nightclublikeResembling or characteristic of a nightclub.
nightcoreA plunderphonic style of music based on taking an original track and speeding it up, increasing its pitch. Usually associated with visuals of anime-style artwork.
nightcrawlerAn earthworm of the species Lumbricus terrestris, known for its large size and nocturnal surfacings.
nightdreamA dream that is experienced while sleeping at night, as distinguished from a daydream.
nightdreamingDreaming that takes place at night, during sleep, as opposed to daydreaming.
nightdressA nightgown; (usually female) attire designed to be worn to bed.
nightguardA guard worn on the teeth to prevent damage from bruxism during sleep.
nighthawkA nightjar, especially Caprimulgus europaeus (Eurasian nightjar).
nighthawkerA metal detectorist who works illegally at night to remove artefacts from archaeological sites.
nighthawkingThe practice of being out late at night, for work or pleasure.
nightieA woman's nightgown or nightdress for wearing to bed.
nightingaleA Eurasian and African songbird, Luscinia megarhynchos, family Muscicapidae, famed for its beautiful singing at night; a common nightingale.
nightjarAny of various medium-sized nocturnal birds, of the family Caprimulgidae from the order Caprimulgiformes, that feed predominantly on moths and other large flying insects.
nightlikeResembling night or some aspect of it; dark, tenebrous.
nightlineAn overnight telephone counselling service, typically for students.
nightlongLasting a night (i.e. the duration of one night); lasting all night.
nightlyHappening or appearing in the night; night-time; nocturnal.
nightmanA person whose job is cleaning cesspools or sewers, or emptying privies by night.
nightmarcherIn Hawaiian folklore, a ghost of an ancient Hawaiian warrior who marches together with other such ghosts on certain sacred nights from their burial sites or the ocean to the sites of ancient battles or sacred places.
nigorobunaA freshwater ray-finned fish (Carassius auratus grandoculis), a wild subspecies of goldfish endemic to Japan, its habitat limited to Lake Biwa and environs.
nigrosinA mixture of synthetic black dyes made by heating a mixture of nitrobenzene, aniline and aniline hydrochloride in the presence of a copper or iron catalyst; used for staining of bacteria and as a colorant.
nigrosineA dark blue synthetic dyestuff of the induline group.
nihilartikelA deliberately fictitious entry in an encyclopedia or academic work, generally identifiable as false, usually included to brand the intellectual property so copies can be identified.