11-letter words containing o, p, s, a
- opalescence — exhibiting a play of colors like that of the opal.
- open season — a specific season or time of year when it is legal to catch or hunt for fish or game protected at all other times by the law.
- open sesame — any marvelously effective means for bringing about a desired result: Wealth is the open sesame to happiness.
- open stance — a batting stance in which the front foot is farther from the inside of the batter's box than the back foot.
- opera house — a theater devoted chiefly to operas.
- opera seria — Italian dramatic opera of the 18th century based typically on a classical subject and characterized by extensive use of the aria da capo and recitative.
- operatories — a room or other area with special equipment and facilities, as for dental surgery, scientific experiments, or the like.
- ophthalmist — an eye expert; an oculist
- opinionates — Third-person singular simple present indicative form of opinionate.
- opisthosoma — the abdomen of a spider or other arachnid
- oral herpes — a disease caused by herpes simplex virus type 1, characterized primarily by a cluster of small, transient blisters chiefly at the edge of the lip or nostril; herpes labialis.
- osteography — The scientific description of bones; osteology.
- osteopathic — Of or pertaining to osteopathy or osteopathic medicine.
- osteoplasty — plastic surgery on a bone to repair a defect or loss.
- ostreophage — someone who loves or eats oysters
- ostreophagy — the consumption of oysters
- Ötztal alps — division of the E Alps, along the Austrian-Italian border: highest peak, 12,379 ft (3,773 m)
- outer space — space beyond the atmosphere of the earth.
- outpatients — Plural form of outpatient.
- outspanning — Present participle of outspan.
- oxtail soup — soup made using the skinned tail of an ox
- packet soup — soup supplied in dried form in a packet
- page proofs — the final version of a book before it goes to the printer, containing all elements including page numbers and layout
- paint horse — paint (def 6).
- palaeologus — family name of Byzantine rulers 1259–1453.
- palos hills — a city in NE Illinois, near Chicago.
- pampelmoose — a large citrus fruit
- panchreston — a proposed explanation intended to address a complex problem by trying to account for all possible contingencies but typically proving to be too broadly conceived and therefore oversimplified to be of any practical use.
- panel house — a brothel having rooms with secret entrances, as sliding panels, for admitting panel thieves.
- panglossian — characterized by or given to extreme optimism, especially in the face of unrelieved hardship or adversity.
- pantisocrat — someone who believes, or takes part, in pantisocracy
- pantologist — a systematic view of all human knowledge.
- pantomimist — a person who acts in pantomime.
- pantoscopic — showing a wide-angled view
- papal cross — a cross with three horizontal crosspieces.
- paperperson — a person who delivers newspapers to customers door to door.
- papovavirus — any of a group of DNA-containing human and animal viruses, including polyoma viruses and some papillomaviruses, most of which produce tumors.
- papyraceous — papery.
- parabolanus — a member of an early Christian brotherhood in Alexandria and Constantinople who helped the sick in the times of plague
- paracrostic — a poem in which the initial letters of each line replicate the first line
- paraglossal — of or relating to paraglossae
- paramastoid — of or relating to the part of the skull next to the mastoid process
- paranephros — the adrenal gland
- parasensory — extrasensory.
- parasitosis — parasitism (def 3).
- parasol ant — leaf-cutting ant.
- parcel post — (in the U.S. Postal Service) nonpreferential mail consisting of packages and parcels, weighing one pound or more sent at fourth-class rates. Compare fourth class.
- parishioner — one of the community or inhabitants of a parish.
- park forest — a city in NE Illinois.
- paronomasia — the use of a word in different senses or the use of words similar in sound to achieve a specific effect, as humor or a dual meaning; punning.