12-letter words containing i, o, n, a, s
- nucleosidase — any of the class of enzymes that catalyze the hydrolysis of nucleosides.
- nucleotidase — a biochemical catalyst that facilitates the process of hydrolyzing or splitting a nucleotide and turning it into a phosphate and a nucleoside
- nugatoriness — Quality of being nugatory.
- oasification — The process of restoring water, soil, and plant life to an environment that has been degraded by soil erosion.
- obfuscations — to confuse, bewilder, or stupefy.
- obscurantism — opposition to the increase and spread of knowledge.
- obscurantist — opposition to the increase and spread of knowledge.
- obscurations — Plural form of obscuration.
- observations — Plural form of observation.
- obstetrician — a physician who specializes in obstetrics. Abbreviation: OB, ob.
- occasionally — at times; from time to time; now and then.
- oceanologist — the practical application of oceanography.
- off-islander — a temporary or seasonal resident of an island; island visitor or tourist.
- oil of anise — the aromatic seed of anise, the oil of which (anise oil, aniseed oil, oil of anise) is used in the manufacture of anethole, in medicine as a carminative and expectorant, and in cookery and liqueurs for its licoricelike flavor.
- old prussian — a Baltic language extinct since the 17th century. Abbreviation: OPruss.
- old slavonic — Old Church Slavonic.
- old-womanish — Sometimes Offensive. having characteristics considered typical of an old woman, as excessive fussiness or timidity.
- oldfashioned — Rare spelling of old-fashioned.
- oleaginously — In an oleaginous manner.
- olefiant gas — ethylene (def 2).
- olfactronics — the measurement and analysis of smells through instruments
- 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.
- on shipboard — on board a ship
- oncornavirus — any of various RNA viruses that cause tumors in humans and other animals.
- one-base hit — single (def 24).
- onion-shaped — bulb-shaped; shaped like an onion
- onomasiology — the study of the means of expressing a given concept.
- onomastician — the study of the origin, history, and use of proper names.
- opera singer — a professional singer of opera
- 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.
- opinionators — Plural form of opinionator.
- oppositional — the action of opposing, resisting, or combating.
- oppressional — Exhibiting or relating to oppression.
- opsonisation — Alternative form of opsonization.
- opsonization — to increase the susceptibility of (bacteria) to ingestion by phagocytes.
- optimisation — Alternative spelling of optimization.
- orange stick — a slender, rounded stick, originally of orangewood, having tapered ends and used in manicuring, especially to push back the cuticles or clean the fingernails.
- ordinariness — of no special quality or interest; commonplace; unexceptional: One novel is brilliant, the other is decidedly ordinary; an ordinary person.
- organisation — the act or process of organizing.
- orientations — Plural form of orientation.
- original sin — Theology. a depravity, or tendency to evil, held to be innate in humankind and transmitted from Adam to all humans in consequence of his sin. inclination to evil, inherent in human nature.
- originations — Plural form of origination.
- oscillations — Plural form of oscillation.
- osco-umbrian — a group of languages, usually classified as Italic, that contains Oscan and Umbrian.
- ossification — the act or process of ossifying.
- ostentations — pretentious or conspicuous show, as of wealth or importance; display intended to impress others.
- ostentatious — characterized by or given to pretentious or conspicuous show in an attempt to impress others: an ostentatious dresser.
- otacousticon — (now rare) An instrument to aid hearing, such as an ear trumpet or hearing aid.
- outdistanced — Simple past tense and past participle of outdistance.