9-letter words containing o, s, i
- bordelais — a wine-growing region in SW France, in Gironde.
- boresight — to verify the alignment of the sights and bore of (a firearm).
- borgesian — of Jorge Luis Borges or his works
- boris iii — 1894–1943, king of Bulgaria 1918–43.
- boskiness — the quality of being bosky
- boskopoid — of, relating to, or characteristic of Boskop man or the culture or habitat of Boskop man.
- bossiness — given to ordering people about; overly authoritative; domineering.
- bostonian — a person from Boston
- botulinus — an anaerobic bacterium, Clostridium botulinum, whose toxins (botulins) cause botulism: family Bacillaceae
- bourgeois — If you describe people, their way of life, or their attitudes as bourgeois, you disapprove of them because you consider them typical of conventional middle-class people.
- bowstring — the string of an archer's bow, usually consisting of three strands of hemp
- boxercise — a system of sustained exercises combining boxing movements with aerobic activities
- brighouse — a town in N England, in Calderdale unitary authority, West Yorkshire: machine tools, textiles, engineering. Pop: 32 360 (2001)
- brimstone — Brimstone is the same as sulphur.
- brimstony — of, relating to or resembling brimstone; sulphurous
- broadside — A broadside is a strong written or spoken attack on a person or institution.
- broadwise — breadthwise
- broccolis — a form of a cultivated cruciferous plant, Brassica oleracea botrytis, whose leafy stalks and clusters of usually green buds are eaten as a vegetable.
- bromeosin — eosin (def 1).
- bronxites — the, a borough of New York City, N of Manhattan. 43.4 sq. mi. (112 sq. km).
- brookings — Robert Somers [suhm-erz] /ˈsʌm ərz/ (Show IPA), 1850–1932, U.S. merchant and philanthropist.
- bulbosity — the quality of being bulbous
- bumptious — If you say that someone is bumptious, you are criticizing them because they are very pleased with themselves and their opinions.
- bursiform — shaped like a pouch or sac
- c rations — tinned food formerly issued in packs to US soldiers
- c-section — A C-section is the same as a Caesarean.
- cacoepist — One who engages in cacoepy, especially frequently.
- caesionid — (zoology) Any member of the Caesionidae.
- calliopes — Plural form of calliope.
- callosity — hardheartedness
- camisoles — Plural form of camisole.
- campesino — a Latin American rural peasant
- canoeists — Plural form of canoeist.
- canonicus — c1565–1647, Narragansett leader: yielded Rhode Island to Roger Williams 1636.
- canonised — Ecclesiastical. to place in the canon of saints.
- canonizes — Third-person singular simple present indicative form of canonize.
- canonries — Plural form of canonry.
- canonship — the position or office of canon; canonry.
- cantonise — divide into cantons
- capacious — Something that is capacious has a lot of space to put things in.
- caparison — a decorated covering for a horse or other animal, esp (formerly) for a warhorse
- caprioles — Plural form of capriole.
- carbolise — phenolate (def 2).
- carbonise — Non-Oxford British standard spelling of carbonize.
- carillons — Plural form of carillon.
- cariosity — (medicine) caries.
- carnosity — an abnormal fleshy protrusion growing on any part of the body
- carousing — to engage in a drunken revel: They caroused all night.
- caryopsis — a dry seedlike fruit having the pericarp fused to the seed coat of the single seed: produced by the grasses
- caseation — the formation of cheese from casein during the coagulation of milk