4-letter words that end in o
- nebo — Mt. See under Pisgah.
- nemo — remote (def 10).
- nero — (Lucius Domitius Ahenobarbus) (“Nero Claudius Caesar Drusus Germanicus”) a.d. 37–68, emperor of Rome 54–68, known for his cruelty and depravity.
- nexo — Martin Andersen [mahr-ten-ah-nuh r-suh n] /ˈmɑr tɛnˈɑ nər sən/ (Show IPA), 1869–1954, Danish novelist.
- nino — boy; child.
- niso — National Information Standards Organisation (USA). NISO Standards cover many aspects of library science, publishing, and information services, and address the application of both traditional and new technologies to information services.
- nolo — nolo contendere.
- nono — anything that is forbidden or not advisable, as because of being improper or unsafe: If you want to lose weight, rich desserts are a no-no.
- nooo — (slang) Emphatic version of no.
- nopo — no person operation; driverless trains suggested as a means of increasing the efficiency of some railway systems
- nzso — New Zealand Symphony Orchestra
- ocso — Order of Cistercians of the Strict Observance (Trappists)
- odso — a cry or interjection of shock or amazement
- ohio — a state in the NE central United States: a part of the Midwest. 41,222 sq. mi. (106,765 sq. km). Capital: Columbus. Abbreviation: OH (for use with zip code), O.
- oleo — margarine.
- olio — a dish of many ingredients.
- omoo — a novel (1847) by Herman Melville.
- ondo — a state of SW Nigeria, on the Bight of Benin. Capital: Akure. Pop: 3 441 024 (2004). Area: 15 500 sq km (5985 sq miles)
- onto — surjection
- oppo — (British, informal) A friend, associate or colleague.
- ordo — Roman Catholic Church. a booklet containing short and abbreviated directions for the contents of the office and Mass of each day in the year.
- oreo — a black person who is regarded as having adopted the attitudes, values, and behavior thought to be characteristic of middle-class white society, often at the expense of his or her own heritage.
- orlo — a plinth supporting the base of a column.
- orzo — pasta in the form of small ricelike grains.
- oslo — Norwegian Norge. a kingdom in N Europe, in the W part of the Scandinavian Peninsula. 124,555 sq. mi. (322,597 sq. km). Capital: Oslo.
- otto — c1175–1218, king of Germany 1208–15; emperor of the Holy Roman Empire 1209–15.
- ouzo — an anise-flavored, colorless liqueur of Greece.
- paco — an alpaca
- paho — a prayer stick of the Hopi Indians.
- pato — an Argentine game played by two teams of four on horseback, resembling a cross between polo and basketball, using a ball with six large leather handles, the object of which is to place or throw the ball through the opponent's net that hangs from a 9 feet (2.7 meters) high pole.
- pavo — a small constellation near the South Pole lying between Tucana and Ara
- pcso — Police Community Support Officer
- pepo — the characteristic fruit of plants of the gourd family, having a fleshy, many-seeded interior and a hard or firm rind, as the gourd, melon, and cucumber.
- peso — a coin and monetary unit of Chile, Colombia, Cuba, the Dominican Republic, Guinea-Bissau, Mexico, and the Philippines, equal to 100 centavos.
- peto — wahoo3 .
- piro — piroplasmosis.
- piso — (in the Philippines) a peso
- poco — somewhat; rather: poco presto.
- pogo — Polar Orbiting Geophysical Observatory.
- pojo — Plain Old Java Object
- polo — Marco [mahr-koh] /ˈmɑr koʊ/ (Show IPA), c1254–1324, Venetian traveler.
- pomo — postmodern.
- prao — proa.
- proo — (to a horse) stop!
- psro — Professional Standards Review Organization: a group of doctors and healthcare professionals monitoring the quality of medical care that is paid for by the federal government in a particular geographical area
- puzo — Mario, 1920–99, U.S. novelist.
- pyro — a pyromaniac.
- quao — (formerly, especially in creole-speaking cultures) a name given at birth to a black child, in accordance with African customs, indicating the child's sex and the day of the week on which he or she was born, as the male and female names for Sunday (Quashee and Quasheba) Monday (Cudjo or Cudjoe and Juba) Tuesday (Cubbena and Beneba) Wednesday (Quaco and Cuba or Cubba) Thursday (Quao and Abba) Friday (Cuffee or Cuffy and Pheba or Phibbi) and Saturday (Quamin or Quame and Mimba)
- rato — rocket-assisted takeoff.
- redo — to do again; repeat.