12-letter words containing s, i, a, m
- old guardism — political conservatism.
- old-womanish — Sometimes Offensive. having characteristics considered typical of an old woman, as excessive fussiness or timidity.
- oligospermia — (medicine) Low volume of semen.
- omnidistance — the distance between an omnirange station and a receiver.
- omnishambles — Chiefly British Informal. a situation, especially in politics, in which poor judgment results in disorder or chaos with potentially disastrous consequences.
- onomasiology — the study of the means of expressing a given concept.
- onomastician — the study of the origin, history, and use of proper names.
- 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.
- ophthalmitis — ophthalmia.
- optic chiasm — a site at the base of the forebrain where the inner half of the fibers of the left and right optic nerves cross to the opposite side of the brain.
- optimisation — Alternative spelling of optimization.
- optimistical — disposed to take a favorable view of events or conditions and to expect the most favorable outcome.
- oscillograms — Plural form of oscillogram.
- osco-umbrian — a group of languages, usually classified as Italic, that contains Oscan and Umbrian.
- 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.
- osteomalacic — a condition characterized by softening of the bones with resultant pain, weakness, and bone fragility, caused by inadequate deposition of calcium or vitamin D.
- otitis media — inflammation of the middle ear, characterized by pain, dizziness, and impaired hearing.
- ovariotomies — Plural form of ovariotomy.
- ovariotomist — a surgeon who performs ovariotomies
- overemphasis — excessive or undue emphasis.
- overestimate — to estimate at too high a value, amount, rate, or the like: Don't overestimate the car's trade-in value.
- oxidant smog — photochemical smog.
- paedobaptism — the baptism of infants
- palimpsestic — a parchment or the like from which writing has been partially or completely erased to make room for another text.
- palindromist — a word, line, verse, number, sentence, etc., reading the same backward as forward, as Madam, I'm Adam or Poor Dan is in a droop.
- palm islands — a group of three man-made island systems under construction just off the shore in Dubai, each in the shape of a palm tree
- palm springs — a city in S California: resort.
- pan-asianism — the idea or advocacy of a political alliance of all the Asian nations.
- pan-islamism — the idea or advocacy of a political union of all Muslim nations.
- panhellenism — the idea or advocacy of a union of all Greeks in one political body.
- pansexualism — the belief that a sexual instinct drives all human behaviour
- panspermatic — relating to panspermia
- parachronism — a chronological error in which a person, event, etc., is assigned a date later than the actual one.
- paragnathism — the condition or fact of having upper and lower jaws of equal length
- parameterise — to describe (a phenomenon, problem, curve, surface, etc.) by the use of parameters.
- paramorphism — the process by which a paramorph is formed.
- paraphimosis — inability to retract the penis into the prepuce as a result of narrowing of the prepuce
- parapsychism — the experience of mental phenomena that are beyond the scope of normal physical explanation
- parasitaemia — the condition of having parasites in the blood
- parkinsonism — Parkinson's disease.
- parochialism — a parochial character, spirit, or tendency; excessive narrowness of interests or view; provincialism.
- paronomastic — 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.
- parsimonious — characterized by or showing parsimony; frugal or stingy.
- patristicism — the study or science of the Fathers
- pax vobiscum — peace be with you
- pearl primus — Pearl, 1919–1994, U.S. dancer, born in Trinidad.
- periostracum — the external, chitinlike covering of the shell of certain mollusks that protects the limy portion from acids.
- peristomatic — surrounding a leaf's stoma or stomata
- perpetualism — a belief in the permanence of a given thing; the belief that a given thing (e.g. the world, a political system) will last forever
- persian lamb — the young lamb of the Karakul sheep.