13-letter words containing n, a, i
- baronial hall — a large building or room owned by a baron
- barosinusitis — aerosinusitis.
- barrel engine — an engine having cylinders arranged around and parallel to a shaft, which they rotate by means of the contact of their piston rods with a swash plate or cam on the shaft.
- barrier-nurse — to tend (infectious patients) in isolation, to prevent the spread of infection
- bartholinitis — Inflammation of Bartholin's cyst.
- basal ganglia — the thalamus together with other closely related masses of grey matter, situated near the base of the brain
- baseline cost — the projected cost for an undertaking at the time it is budgeted
- basic english — a simplified form of English, proposed by C. K. Ogden and I. A. Richards, containing a vocabulary of approximately 850 of the commonest English words, intended as an international language
- basic fortran — (language) A subset of Fortran.
- basket dinner — a group social gathering, as of church members, to which participants contribute casseroles or other dishes to share.
- basking shark — a very large plankton-eating shark, Cetorhinus maximus, often floating at the sea surface: family Cetorhinidae
- bass clarinet — a clarinet with the lowest range, in the octave below the B-flat clarinet
- bass-baritone — a singer or voice in the bass range with baritone qualities
- bassenthwaite — a lake in NW England, in Cumbria near Keswick. Length: 6 km (4 miles)
- bastard eigne — the first-born illegitimate son of parents whose second son was legitimate.
- batan islands — a group of islands in the Philippines, north of Luzon. Capital: Basco. Pop: 16 467 (2000). Area: 197 sq km (76 sq miles)
- bathylimnetic — (of an organism) living in the depths of lakes and marshes
- baton twirler — someone who twirls a baton, esp a drum major or majorette
- batrachotoxin — a steroidal alkaloid, C31H42N2O6, found in the skin of certain Neotropical frogs (genus Phyllobates) and used on poison arrows: one of the most powerful natural neurotoxins known
- battering ram — A battering ram is a long heavy piece of wood that is used to knock down the locked doors of buildings.
- battering-ram — an ancient military device with a heavy horizontal ram for battering down walls, gates, etc.
- batting order — the sequence in which hitters will bat in a given game, determined in advance by the team manager.
- bazillionaire — (humorous) An incredibly rich person.
- bcg (vaccine) — a vaccine prepared from an attenuated strain of the tubercle bacillus, used for immunization against tuberculosis
- be hard going — If you say that something is hard going, you mean it is difficult and requires a lot of effort.
- be upstanding — (in a court of law) a direction to all persons present to rise to their feet before the judge enters or leaves the court
- beaking joint — a straight joint made by several members, as strips of flooring, ending at the same line.
- beanbag chair — a chair like a large beanbag covered with vinyl, fabric, etc. and filled with foam pellets, as of polystyrene, that shift about to fit one's body
- bearing plate — a heavy metal plate for receiving and distributing concentrated weight, as from a column or one end of a truss.
- bearing sword — a large sword carried for its owner by a squire or servant because of its size.
- beatification — a beatifying or being beatified
- beautifulness — having beauty; possessing qualities that give great pleasure or satisfaction to see, hear, think about, etc.; delighting the senses or mind: a beautiful dress; a beautiful speech.
- bedding plane — the surface separating two successive layers of stratified rock
- bedding plant — A bedding plant is a plant which lasts for one year. It is put in a flower bed before it flowers, and is then removed when it has finished flowering.
- bedding-plant — bedmaker (def 1).
- beetlebrained — stupid
- belgian congo — former Belgian colony (1908-60) in central Africa: now the country of Democratic Republic of the Congo
- bellefontaine — a city in W Ohio.
- belly landing — the landing of an aircraft on its fuselage without use of its landing gear
- benedictional — a book of benedictions or blessings
- beneficential — relating to beneficence
- beneficiary's — a person or group that receives benefits, profits, or advantages.
- beneficiation — the procedure of reducing ores
- benefit fraud — the illegal activity of claiming benefit payments which a person is not entitled to
- benefit match — a sports match organized to raise money for charity, or for a particular player
- bengal quince — bael.
- benito juarez — Benito (Pablo) [be-nee-taw pah-vlaw] /bɛˈni tɔ ˈpɑ vlɔ/ (Show IPA), 1806–72, president of Mexico 1857–72.
- benjamin west — Benjamin, 1738–1820, U.S. painter, in England after 1763.
- benjamin-bush — Also called spice-wood. a yellow-flowered, North American shrub, Lindera benzoin, of the laurel family, whose bark and leaves have a spicy odor.
- benthopelagic — relating to species living at the bottom of the sea