12-letter words that end in a
- north dakota — a state in the N central United States. 70,665 sq. mi. (183,020 sq. km). Capital: Bismarck. Abbreviation: ND (for use with zip code), N. Dak.
- nueva gerona — a town on the Isle of Pines, S of Cuba.
- nulligravida — A female who has never been pregnant.
- number opera — an opera in which the arias, ensembles, recitatives, and other sections are clearly separated from one another.
- oda nobunaga — 1534–82, Japanese general and feudal leader, who unified much of Japan under his control: assassinated
- odontophobia — an unnatural dread or terror of teeth
- oligophrenia — less than normal mental development.
- oligospermia — (medicine) Low volume of semen.
- olla podrida — a spicy Spanish stew of sausage and other meat, chickpeas, and often tomatoes and other vegetables.
- online media — Acorn Online Media
- onomatapoeia — Misspelling of onomatopoeia.
- onomatomania — An unnatural obsession with a particular word.
- onomatopoeia — the formation of a word, as cuckoo, meow, honk, or boom, by imitation of a sound made by or associated with its referent.
- onychophagia — the practice of biting one's nails, especially when done habitually and as a symptom of emotional disturbance.
- orchidomania — an obsession with or passion for orchids
- orion nebula — a luminous nebula in the constellation Orion, in the center of Orion's sword.
- osteomalacia — a condition characterized by softening of the bones with resultant pain, weakness, and bone fragility, caused by inadequate deposition of calcium or vitamin D.
- osteosarcoma — a malignant tumor of the bone.
- otitis media — inflammation of the middle ear, characterized by pain, dizziness, and impaired hearing.
- oxford comma — a comma between the final items in a list, often preceding the word 'and' or 'or', such as the final comma in the list newspapers, magazines, and books
- panaesthesia — an individual's general awareness or perception
- panchen lama — Tashi Lama.
- pancho-villa — Francisco [frahn-sees-kaw] /frɑnˈsis kɔ/ (Show IPA), (Doroteo Arango"Pancho Villa") 1877–1923, Mexican general and revolutionist.
- pancytopenia — an abnormally low level of all blood cells
- paraesthesia — an abnormal sensation, as prickling, itching, etc.
- paraguay tea — maté.
- paralipomena — Chronicles.
- parallel ata — Parallel Advanced Technology Attachment
- parasitaemia — the condition of having parasites in the blood
- park savanna — savanna grassland scattered with trees
- pascal-linda — Ian Flockhart, U Edinburgh, 1991. Under development.
- pedicellaria — one of the minute pincerlike structures common to starfish and sea urchins, used for cleaning and to capture tiny prey.
- penalty area — the area, 44 yards (40 meters) wide and 18 yards (16 meters) deep, centered on the goal line and extending in front of the goal, where a foul by a defensive player results in a penalty kick for the offensive team.
- pennsylvania — a state in the E United States. 45,333 sq. mi. (117,410 sq. km). Capital: Harrisburg. Abbreviation: PA (for use with zip code), Pa., Penn., Penna.
- penthesileia — the daughter of Ares and queen of the Amazons, whom she led to the aid of Troy. She was slain by Achilles
- period drama — a drama set in a particular historical period
- petach tikva — a city in W Israel, NE of Tel Aviv.
- pharmacopeia — a book published usually under the jurisdiction of the government and containing a list of drugs, their formulas, methods for making medicinal preparations, requirements and tests for their strength and purity, and other related information.
- phengophobia — an abnormal dread or terror of natural light
- philadelphia — a city in SE Pennsylvania, on the Delaware River: Declaration of Independence signed here July 4, 1776.
- phonasthenia — difficult or abnormal voice production; vocal weakness.
- phosphaturia — the presence of an excessive quantity of phosphates in the urine.
- phytophthora — any of a group of fungi of the genus Phytophthora, which cause a serious plant disease, especially affecting apple and pear trees and potatoes.
- plasmosomata — a kind of nucleoli
- poland china — one of an American breed of black hogs having white markings.
- polycythemia — an abnormal increase in the number and concentration of circulating red blood corpuscles
- ponta grossa — a city in S Brazil.
- porto amelia — former name of Pemba (def 2).
- potichomania — the art or process of printing or using paint to decorate the inside of a glass vessel
- preeclampsia — Pathology. a form of toxemia of pregnancy, characterized by hypertension, fluid retention, and albuminuria, sometimes progressing to eclampsia.