12-letter words containing o, p, e, n, a
- onomatopoeia — the formation of a word, as cuckoo, meow, honk, or boom, by imitation of a sound made by or associated with its referent.
- onomatopoeic — the formation of a word, as cuckoo, meow, honk, or boom, by imitation of a sound made by or associated with its referent.
- opalescently — In an opalescent manner.
- open account — current account (def 1).
- open channel — An open channel is a type of flow in which one surface is free (= not restricted by anything).
- open primary — a direct primary election in which voters need not meet a test of party membership.
- open slather — to spread or apply thickly: to slather butter on toast.
- open trailer — any dog that barks or bays on the trail of its quarry.
- open-hearted — unreserved, candid, or frank: open-hearted advice.
- opera singer — a professional singer of opera
- opera window — a narrow, fixed window on each side of the rear passenger compartment of an automobile.
- operationism — the doctrine that the meaning of a scientific term, concept, or proposition consists of the operation or operations performed in defining or demonstrating it.
- opinionately — in a conceited or vain manner
- opinionative — of, relating to, or of the nature of opinion.
- opinionnaire — A form containing a list of statements, each of which the members of a selected group are asked to endorse or reject; the purpose being to gather information for a survey.
- oppressional — Exhibiting or relating to oppression.
- orange pekoe — a black tea composed of the smallest top leaves and grown in India and Ceylon.
- oregon grape — an evergreen shrub, Mahonia aquifolium, of the barberry family, of the western coast of the U.S., having small blue berries and yellow flowers that are the state flower of Oregon.
- organoleptic — perceived by a sense organ.
- oropharynxes — Plural form of oropharynx.
- orthopterans — Plural form of orthopteran.
- outer planet — any of the four planets with orbits outside the orbit of Mars, namely, the planets Jupiter, Saturn, Uranus, and Neptune.
- outplacement — counseling and assistance in finding a new job, provided by a company for an employee who has been or is about to be dismissed.
- outspreading — Present participle of outspread.
- over-explain — to make plain or clear; render understandable or intelligible: to explain an obscure point. Synonyms: explicate. Antonyms: confuse.
- overplanning — the act or instance of planning excessively
- oyster plant — salsify.
- packinghouse — a building where foodstuffs are packed
- paedodontics — the branch of dentistry that focuses on the care of children's teeth
- paedogenesis — sexual reproduction in an animal that retains its larval features
- paint roller — a roller of absorbent material, mounted on a handle, that is rolled in a trough of paint and then rolled over a flat surface to be painted.
- palaeobotany — the study of fossil plants
- paleo-indian — of, relating to, or characteristic of a New World cultural stage, c22,000–6000 b.c., distinguished by fluted-point tools and cooperative hunting methods.
- paleontology — the science of the forms of life existing in former geologic periods, as represented by their fossils.
- pan-european — of or relating to all or most of the countries of Europe.
- pancake coil — a coil (of wire, etc) wound in a flat circular shape
- pancake roll — A pancake roll is an item of Chinese food consisting of a small roll of thin crisp pastry filled with vegetables and sometimes meat.
- pancytopenia — an abnormally low level of all blood cells
- pandanaceous — of, relating to, or belonging to the Pandanaceae, an Old World tropical family of monocotyledonous plants including the screw pines
- panel doctor — a doctor within a given area available for consultation by patients insured under the National Health Insurance Scheme
- pantaloonery — foolery; humorous entertainment
- pantechnicon — a furniture van; moving van.
- pantothenate — a widely occurring derivative of pantothenic acid
- paracyanogen — a polymer of cyanogen
- paradoxurine — relating to the palm civet
- parahydrogen — the form of molecular hydrogen in which the nuclei of the two hydrogen atoms contained in the molecule have spins in opposite directions.
- paralipomena — Chronicles.
- paramorphine — thebaine.
- paranthelion — a bright spot in the sky caused by refraction and occurring at an angular distance from the sun of between 90° and 140°
- parasol pine — stone pine (def 1).