13-letter words containing s, t, e, r, o
- old northwest — a territory of Canada lying N of 60 degrees N and extending E from the Yukon Territory to Nunavut. 519,732 sq. mi. (1,346,106 sq. km) Capital: Yellowknife.
- olfactometers — Plural form of olfactometer.
- omnipresently — In an omnipresent manner.
- on good terms — in a friendly way, amicably
- on its merits — on the intrinsic qualities or virtues
- on one's part — a portion or division of a whole that is separate or distinct; piece, fragment, fraction, or section; constituent: the rear part of the house; to glue the two parts together.
- on the parish — receiving parochial relief
- on the square — a rectangle having all four sides of equal length.
- on the street — a public thoroughfare, usually paved, in a village, town, or city, including the sidewalk or sidewalks.
- on your terms — If you do something on your terms, you do it under conditions that you decide because you are in a position of power.
- one's forties — the ages between 40 and 49
- oneiroscopist — a person who specialises in studying and interpreting dreams
- open registry — ship registration under a national flag available to all ships regardless of nationality.
- open-standard — (of computer programs, codes, etc) freely available to all users
- opentransport — (networking) (OT) A complete reimplementation of all levels of the Macintosh networking code including "Classic" AppleTalk and MacTCP. It appeared in MacOS revision 7.5.3 [or earlier? Date?].
- operativeness — (uncountable) The state or quality of being operative.
- opportuneness — The state or condition of being opportune.
- opportunities — Plural form of opportunity.
- orate fratres — the call to prayer, addressed by the celebrant of the Mass to the people just before the Secret.
- orchestra pit — musicians' seating in front of stage
- orchestra-pit — a group of performers on various musical instruments, including especially stringed instruments of the viol class, clarinets and flutes, cornets and trombones, drums, and cymbals, for playing music, as symphonies, operas, popular music, or other compositions.
- orchestralist — a person who writes or arranges orchestral music
- orchestrating — Present participle of orchestrate.
- orchestration — (uncountable) the arrangement of music for performance by an orchestra.
- orchestrators — Plural form of orchestrator.
- orchiectomies — Plural form of orchiectomy.
- organ whistle — a steam or air whistle in which the jet is forced up against the thin edge of a pipe closed at the top.
- originalities — Plural form of originality.
- ornamentalism — the desire or tendency to feature ornament in the design of buildings, interiors, furnishings, etc.
- ornamentalist — A person who ornaments.
- orthogonalise — to make (vectors, functions, etc.) orthogonal.
- orthographies — Plural form of orthography.
- orthosilicate — a silicate mineral
- oscillometric — an instrument for measuring oscillations, especially those of the arterial pulse.
- osmoregulator — Any organism that practices osmoregulation.
- osteofibrosis — loss of calcium from the bones, causing them to become fragile
- osteopetrosis — any of several hereditary diseases characterized by increased bone density.
- ostreiculture — the breeding of oysters
- ostreophagous — oyster-eating
- otherworldish — characterized by otherworldliness
- otto of roses — rose oil.
- out of square — a rectangle having all four sides of equal length.
- out-of-stater — a visitor from another state of the U.S.: Many out-of-staters come to our summer music festival.
- outdoorswomen — Plural form of outdoorswoman.
- outlaw strike — wildcat strike.
- outperformers — Plural form of outperformer.
- outprocessing — to end a military tour of duty, accompanied by necessary paperwork: All enlisted soldiers out-process as a class.
- outside-right — a footballer who plays on the outside right wing of the field
- outstretching — Present participle of outstretch.
- ovariectomies — Plural form of ovariectomy.