13-letter words containing n, o, a, h
- on the parish — receiving parochial relief
- on the razzle — out enjoying oneself or celebrating, esp while drinking freely
- on the square — a rectangle having all four sides of equal length.
- one-punch law — a law prescribing punitive sentences for assault, including assault comprising a single blow
- one-upmanship — the art or practice of achieving, demonstrating, or assuming superiority in one's rivalry with a friend or opponent by obtaining privilege, status, status symbols, etc.: the one-upmanship of getting into the president's car pool.
- onychophagist — the practice of biting one's nails, especially when done habitually and as a symptom of emotional disturbance.
- onychophorans — Plural form of onychophoran.
- open and shut — immediately obvious upon consideration; easily decided: an open-and-shut case of murder.
- open sandwich — a sandwich served on only one slice of bread, without a covering slice.
- open-and-shut — immediately obvious upon consideration; easily decided: an open-and-shut case of murder.
- openheartedly — Alt form open-heartedly.
- 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.
- oprahfication — the perceived increase in people’s desire to discuss their emotions or personal problems, attributed to the influence of confessional television programmes
- 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.
- orange roughy — a marine food fish, Hoplosthenus atlanticus, of S Pacific waters
- orange squash — an orange-flavoured drink made from fruit juice, sugar, and water
- orchestrating — Present participle of orchestrate.
- orchestration — (uncountable) the arrangement of music for performance by an orchestra.
- orchidomaniac — a person who is obsessed with or has a passion for orchids
- 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.
- organolithium — (organic chemistry) Describing any organic compound containing a carbon to lithium bond.
- organotherapy — the branch of therapeutics that deals with the use of remedies prepared from the organs of animals, as from the thyroid gland, the pancreas, or the suprarenal bodies.
- ornithischian — any herbivorous dinosaur of the order Ornithischia, having a pelvis resembling that of a bird. Compare saurischian.
- ornithomantic — relating to ornithomancy
- ornithophobia — Fear of birds.
- oropharyngeal — the part of the pharynx between the soft palate and the upper edge of the epiglottis.
- orthodiagonal — the axis in a crystal
- orthognathous — straight-jawed; having the profile of the face vertical or nearly so; having a gnathic index below 98.
- orthogonalise — to make (vectors, functions, etc.) orthogonal.
- orthogonality — (mathematics, statistics) the property of being orthogonal.
- orthogonalize — to make (vectors, functions, etc.) orthogonal.
- orthopinakoid — a crystalline plane
- outwash plain — Geology. a broad, sloping landform built of coalesced deposits of outwash.
- overachieving — Present participle of overachieve.
- overbreathing — hyperventilation
- overhand knot — a simple knot of various uses that slips easily.
- overhastiness — the condition of being overhasty
- overnight bag — a travel bag large enough to hold personal articles and clothing for an overnight trip.
- packing house — A packing house is a company that processes and packs food, especially meat, to be sold.
- painted horse — paint (def 6).
- paleethnology — (formerly) the branch of ethnology concerned with the earliest or most primitive human societies.
- pandora shell — any marine bivalve of the genus Pandora, having a scimitar-shaped shell with a pronounced ridge along the hinge.
- panharmonicon — a mechanical instrument that imitates orchestral sounds
- pantheologist — a student of, or expert in, pantheology
- parasyntheton — a word formed by parasynthesis; for example, kind-hearted
- parencephalon — a cerebral hemisphere
- parental home — a school for problem children.
- parnell shout — a social occasion where each person in a group pays for his or her own entertainment or meal
- parthenocarpy — the production of fruit without fertilization of an egg in the ovary.
- parthenopaeus — a son of Hippomenes and Atalanta, and one of the Seven against Thebes.