13-letter words containing a, b, n, o
- objectionably — causing or tending to cause an objection, disapproval, or protest.
- oblique angle — an angle that is not a right angle; an acute or obtuse angle.
- observational — of, relating to, or founded on observation, especially founded on observation rather than experiment.
- obsessionally — In an obsessional manner.
- obstetricians — Plural form of obstetrician.
- obstinateness — The characteristic of being obstinate.
- obtainability — to come into possession of; get, acquire, or procure, as through an effort or by a request: to obtain permission; to obtain a better income.
- octane number — (of gasoline) a designation of antiknock quality, numerically equal to the percentage of isooctane by volume in a mixture of isooctane and normal heptane that matches the given gasoline in antiknock characteristics.
- odontoblastic — Relating to odontoblasts.
- old bulgarian — the Bulgarian language of the Middle Ages.
- ombudsmanship — The position or office of an ombudsman.
- on one's back — the rear part of the human body, extending from the neck to the lower end of the spine.
- onus probandi — the burden of proof.
- open a bottle — If you open a bottle, you remove the cork or cap.
- opisthobranch — any gastropod mollusk of the order Opisthobranchia, as the sea slugs, sea butterflies, and sea hares, characterized by a vestigial or absent mantle and shell and two pairs of tentacles.
- optical bench — an apparatus, as a special table or rigid beam, for the precise positioning of light sources, screens, and optical instruments used for optical and photometric studies, having a ruled bar to which these devices can be attached and along which they can be readily adjusted.
- ora pro nobis — a Latin invocation meaning pray for us
- orbital index — the ratio of the maximum breadth to the maximum height of the orbital cavity multiplied by 100.
- orbitofrontal — Located in the frontal lobes above the orbits of the eyes.
- organ-builder — a maker of organs
- ornithophobia — Fear of birds.
- osborne, adam — Adam Osborne
- out and about — busy, active outside the home
- out on a limb — a part or member of an animal body distinct from the head and trunk, as a leg, arm, or wing: the lower limbs; artificial limbs.
- outward bound — (in Britain) a scheme to provide adventure training for young people
- outward-bound — headed in an outward direction, as toward foreign ports: We passed an outward-bound ship as we came into the harbor.
- over-abundant — an excessive amount or abundance; surfeit: an overabundance of sugar in the diet.
- overabundance — an excessive amount or abundance; surfeit: an overabundance of sugar in the diet.
- overbalancing — Present participle of overbalance.
- overbearingly — domineering; dictatorial; haughtily or rudely arrogant.
- overbreathing — hyperventilation
- overexuberant — effusively and almost uninhibitedly enthusiastic; lavishly abundant: an exuberant welcome for the hero.
- overnight bag — a travel bag large enough to hold personal articles and clothing for an overnight trip.
- overrun brake — a brake fitted to a trailer or other towed vehicle that prevents the towed vehicle travelling faster than the towing vehicle when slowing down or descending an incline
- paleosiberian — a group of languages comprising those languages of Siberia that are not affiliated with Indo-European, Altaic, Uralic, or Eskimo-Aleut and including the Chukotian family and the unrelated language isolates Ket, Nivkh, and Yukaghir; Paleo-Asiatic.
- pandora's box — a source of extensive but unforeseen troubles or problems: The senate investigation turned out to be a Pandora's box for the administration.
- pannikin boss — an overseer of a small group of workers; person with minor authority.
- parietal bone — either of a pair of membrane bones forming, by their union at the sagittal suture, part of the sides and top of the skull.
- parking orbit — a temporary orbit in which a spacecraft awaits the next phase of its mission.
- parsons table — a square or rectangular table, often of lightweight material, with straight legs that are square in cross section and of the same thickness as the top extending from the corners flush with the top so as to appear jointless.
- partitionable — a division into or distribution in portions or shares.
- penobscot bay — an inlet of the Atlantic in S Maine. 30 miles (48 km) long.
- pensacola bay — an inlet of the Gulf of Mexico, in NW Florida. About 30 miles (48 km) long.
- pentobarbital — a barbiturate, C 1 1 H 1 7 N 2 O 3 , used as a hypnotic and as a sedative.
- perambulation — to walk through, about, or over; travel through; traverse.
- perditionable — deserving perdition or damnation
- personal best — A sports player's personal best is the highest score or fastest time that they have ever achieved.
- phenobarbital — a white, crystalline powder, C 1 2 H 1 2 N 2 O 3 , used as a sedative, a hypnotic, and as an antispasmodic in epilepsy.
- phony-baloney — nonsense; baloney.
- pigeon breast — chicken breast.