Napoleon Dynamite, a 2004 independent film

North Dakota, a state in the United States

Neodymium, an element with the symbol "Nd"

No Doubt, a ska band from the United States

Napalm Death, a pioneering grindcore band from England

Doctor of Naturopathic Medicine, an academic degree in naturopathic medicine

Nuclear disarmament, the dismantlement and proposed dismantling of nuclear weapons

nD, a type of alien from the United Kingdom TV series Invasion Earth.

Norsk Data, a defunct Norwegian computer manufacturer

New Democracy (Greece), one of the main center-right liberal political parties in Greece

NADH dehydrogenase, an enzyme that catalyzes the transfer of electrons from NADH to coenzyme Q

Notre Dame, for a number of churches and colleges

Neutral density filter, a type of filter used in photography

Nd (digraph), a digraph present in many African languages

New Democracy (Canada), a former political party in Canada

National Diploma, an academic qualification in the Republic of Ireland

Negligent discharge, an accidental discharge of a firearm involving culpable carelessness