12-letter words containing o, n, s, i
- browser skin — a changeable decorative background for a browser
- buenos aires — the capital of Argentina, a major port and industrial city on the Río de la Plata estuary: became capital in 1880; university (1821). Pop: 13 349 000 (2005 est)
- bull session — A bull session is an informal conversation among a small group of people.
- bunco artist — a confidence trickster or con artist
- burkina faso — an inland republic in W Africa: dominated by Mossi kingdoms (10th–19th centuries); French protectorate established in 1896; became an independent republic in 1960; consists mainly of a flat savanna plateau. Official language: French; Mossi and other African languages also widely spoken. Religion: mostly animist, with a large Muslim minority. Currency: franc. Capital: Ouagadougou. Pop: 17 812 961 (2013 est). Area: 273 200 sq km (105 900 sq miles)
- byelorussian — Byelorussian means belonging or relating to Byelorussia or to its people or culture.
- cacophonious — cacophonous
- caenogenesis — the development of structures and organs in an embryo or larva that are adaptations to its way of life and are not retained in the adult form
- caesalpinoid — of, relating to, or belonging to the Caesalpinoideae, a mainly tropical subfamily of leguminous plants that have irregular flowers: includes carob, senna, brazil, cassia, and poinciana
- calculations — Plural form of calculation.
- calibrations — Plural form of calibration.
- caliginosity — darkness
- calumniators — Plural form of calumniator.
- calumniously — in a calumnious manner
- camp bastion — a large British military base in Helmand province, Afghanistan, built in 2006
- canalisation — The conversion of a river or other waterway to a canal.
- canine corps — a military or law enforcement body which uses dogs for the detection of explosives or drugs or for security, tracking, etc
- cannabinoids — Plural form of cannabinoid.
- canonicalise — (transitive, computing, UK) Alternative form of canonicalize.
- canonisation — Alternative spelling of canonization.
- caparisoning — Present participle of caparison.
- cape sounion — Cape, a cape in E central Greece, SE of Athens, at the tip of the Attica peninsula, in W Aegean Sea.
- capsaicinoid — (organic chemistry) Any of a class of irritant compounds, related to capsaicin, that are responsible for the heat of chilli peppers.
- captiousness — The state of being captious.
- carbocations — Plural form of carbocation.
- carbonatites — Plural form of carbonatite.
- carnivourous — Misspelling of carnivorous.
- carryings-on — wild, extravagant, or immoral behavior
- cartoonishly — in a cartoonish manner
- castellation — Architecture. built like a castle, especially with turrets and battlements.
- castigations — Plural form of castigation.
- casting vote — When a committee has given an equal number of votes for and against a proposal, the chairperson can give a casting vote. This vote decides whether or not the proposal will be passed.
- catch points — railway points designed to derail a train running back in the wrong direction to prevent collision with a following train
- categorising — to arrange in categories or classes; classify.
- cater-cousin — a close friend
- causationism — the theory of universal causation
- causationist — a person who believes in the theory of universal causation
- cautiousness — showing, using, or characterized by caution: a cautious man; To be cautious is often to show wisdom.
- ceiling rose — decorative plaster centrepiece
- celebrations — Plural form of celebration.
- cementitious — of, relating to, or characteristic of cement
- censoriously — In a censorious manner.
- centimorgans — Plural form of centimorgan.
- ceratopsians — Plural form of ceratopsian.
- cerebrations — Plural form of cerebration.
- cessationism — The concept, amongst most Christians, that the works of the Holy Spirit (speaking in tongues, prophecy, healing, and miracles) ceased at some point in history.
- cessationist — One who subscribes to cessationism.
- chain smoker — person: smokes heavily
- chain-smoker — A chain-smoker is a person who chain-smokes.
- chairpersons — Plural form of chairperson.