8-letter words containing d, i, o
- oil sand — a sand or sandstone containing oil or tarry residue in the pore spaces.
- oilfield — an area in which there are large deposits of oil.
- oilfired — (of central heating) using oil as fuel
- oilsands — Plural form of oilsand.
- oilseeds — Plural form of oilseed.
- old bill — a policeman
- old bird — Some people use the phrase old bird to refer to someone and say what they are like.
- old girl — Chiefly British. a former student at a girl's school, especially a preparatory school.
- old maid — Disparaging and Offensive. an elderly or confirmed spinster.
- old nick — the devil; Satan.
- old-line — following or supporting conservative or traditional ideas, beliefs, customs, etc.
- old-time — belonging to or characteristic of old or former times, methods, ideas, etc.: old-time sailing ships; an old-time piano player.
- oldening — Present participle of olden.
- oldfield — Berna Eli [bur-nuh] /ˈbɜr nə/ (Show IPA), ("Barney") 1878–1946, U.S. racing-car driver.
- oldtimer — An elderly person.
- olympiad — a period of four years reckoned from one celebration of the Olympic Games to the next, by which the Greeks computed time from 776 b.c.
- omnicode — Thompson, 1956. Ran on IBM 650.
- omnimode — of all functions
- omohyoid — a muscle found in the shoulder
- on-glide — a transitional sound produced by the vocal organs in moving from an inactive position or a previous sound to the articulatory position necessary for producing a following sound. Compare off-glide (def 1).
- oncidium — any of numerous tropical American orchids of the genus Oncidium, having clusters of flowers showing great variety in size, form, and color.
- onesided — Biased, only showing one side or point of view on an argument.
- oniscoid — of or similar to woodlice
- opalized — made into an opal
- open die — a die of flat, concave, or hollow V shape that only minimally restricts lateral flow.
- openside — (rugby), the space on the side of the pitch with the larger distance between the breakdown/set piece and the touchline; compare blindside.
- ophidian — belonging or pertaining to the suborder Ophidia (Serpentes), comprising the snakes.
- ophidiid — any fish of the family Ophidiidae, comprising the cusk-eels.
- ophidism — Poisoning by snake venom.
- oppidans — Plural form of oppidan.
- optioned — the power or right of choosing.
- opus dei — an international Roman Catholic organization of lay people and priests founded in Spain in 1928 by Josemaria Escrivá de Balaguer (1902–75), with the aim of spreading Christian principles
- orcadian — a native or inhabitant of Orkney
- orchido- — testicle
- ordained — to invest with ministerial or sacerdotal functions; confer holy orders upon.
- ordainee — a person who has been recently ordained as a new member of the clergy.
- ordainer — A person (usually a clergyman) who ordains.
- ordalian — relating to trial by ordeal
- ordering — an authoritative direction or instruction; command; mandate.
- ordinals — Plural form of ordinal.
- ordinand — Ecclesiastical. a candidate for ordination.
- ordinant — a line parallel to the y-axis or a distance of one point from the x-axis
- ordinary — of no special quality or interest; commonplace; unexceptional: One novel is brilliant, the other is decidedly ordinary; an ordinary person.
- ordinate — Mathematics. (in plane Cartesian coordinates) the y-coordinate of a point: its distance from the x-axis measured parallel to the y-axis.
- organdie — a fine, thin cotton fabric usually having a durable crisp finish, white, dyed, or printed: used for blouses, dresses, curtains, trimmings, etc.
- organoid — Resembling an organ of the body.
- oribatid — a mite of the family Oribatoidea
- orielled — having an oriel window
- oriented — the Orient, the countries of Asia, especially East Asia. (formerly) the countries to the E of the Mediterranean.
- orionids — a collection of meteors comprising a meteor shower (Orionid meteor shower) visible during October, and having its apparent origin in the constellation Orion.