8-Letter Nouns Starting With O
Here's the list of all the 541 8-Letter Nouns Starting With O in the English Language.
The list is arranged by the word lengths. Click on the length below to jump to the relevant section of the page.
| Common Nouns (with Definitions and Examples) | |
|---|---|
| original | 1. an original creation (i.e., an audio recording) from which copies can be made 2. something that serves as a model or a basis for making copies More Definitions → |
| official | 1. a worker who holds or is invested with an office 2. someone who administers the rules of a game or sport More Definitions → |
| overview | 1. a general summary of a subject More Definitions → |
| optional | More Definitions → |
| offering | 1. something offered (as a proposal or bid) 2. money contributed to a religious organization; item or items contributed to a religious organization for religious purposes More Definitions → |
| ordering | 1. logical or comprehensible arrangement of separate elements 2. the act of putting things in a sequential arrangement More Definitions → |
| outdoors | 1. where the air is unconfined More Definitions → |
| operator | 1. (mathematics) a symbol or function representing a mathematical operation 2. an agent that operates some apparatus or machine More Definitions → |
| overseas | More Definitions → |
| ordinary | 1. a judge of a probate court 2. the expected or commonplace condition or situation More Definitions → |
| opposite | 1. a word that expresses a meaning opposed to the meaning of another word, in which case the two words are antonyms of each other 2. a relation of direct opposition More Definitions → |
| occasion | 1. an event that occurs at a critical time 2. a formal or official social gathering or ceremony of people More Definitions → |
| offshore | More Definitions → |
| outreach | 1. the act of reaching out More Definitions → |
| observer | 1. a person who becomes aware (of things or events) through the senses 2. an expert who observes and comments on something More Definitions → |
| oriental | More Definitions → |
| overhead | 1. the expense of maintaining property (e.g., paying property taxes and utilities and insurance); it does not include depreciation or the cost of financing or income taxes 2. (computer science) the processing time required by a device prior to the execution of a command More Definitions → |
| opponent | 1. a contestant that you are matched against 2. someone who offers opposition More Definitions → |
| outgoing | More Definitions → |
| offender | 1. a person who transgresses moral or civil law More Definitions → |
| oncology | 1. the branch of medicine concerned with the study and treatment of tumors More Definitions → |
| orthodox | More Definitions → |
| overtime | 1. work done in addition to regular working hours 2. playing time beyond regulation, to break a tie More Definitions → |
| organism | 1. a living thing that has (or can develop) the ability to act or function independently 2. a system considered analogous in structure or function to a living body More Definitions → |
| overflow | 1. a large flow 2. the occurrence of surplus liquid (as water) exceeding the limit or capacity More Definitions → |
| outbreak | 1. a sudden violent spontaneous occurrence (usually of some undesirable condition) More Definitions → |
| ornament | 1. something used to beautify More Definitions → |
| override | 1. a manually operated device to correct the operation of an automatic device 2. the act of nullifying; making null and void; counteracting or overriding the effect or force of something More Definitions → |
| overland | More Definitions → |
| overload | 1. an electrical load that exceeds the available electrical power 2. an excessive burden More Definitions → |
| obituary | 1. a notice of someone's death; usually includes a short biography More Definitions → |
| overdose | More Definitions → |
| obstacle | 1. something immaterial that stands in the way and must be circumvented or surmounted 2. an obstruction that stands in the way (and must be removed or surmounted or circumvented) More Definitions → |
| ontology | 1. (computer science) a rigorous and exhaustive organization of some knowledge domain that is usually hierarchical and contains all the relevant entities and their relations 2. the metaphysical study of the nature of being and existence More Definitions → |
| omission | 1. a mistake resulting from neglect 2. something that has been omitted More Definitions → |
| overture | 1. orchestral music played at the beginning of an opera or oratorio 2. something that serves as a preceding event or introduces what follows More Definitions → |
| openness | 1. without obstructions to passage or view 2. characterized by an attitude of ready accessibility (especially about one's actions or purposes); without concealment; not secretive More Definitions → |
| overcast | 1. the state of the sky when it is covered by clouds 2. gloomy semidarkness caused by cloud cover More Definitions → |
| optimism | 1. the optimistic feeling that all is going to turn out well 2. a general disposition to expect the best in all things More Definitions → |
| overhaul | 1. periodic maintenance on a car or machine 2. the act of improving by renewing and restoring More Definitions → |
| overlook | 1. a high place affording a good view More Definitions → |
| oblivion | 1. the state of being disregarded or forgotten 2. total forgetfulness More Definitions → |
| ordnance | 1. military supplies 2. large but transportable armament More Definitions → |
| outboard | 1. a motorboat with an outboard motor 2. internal-combustion engine that mounts at stern of small boat More Definitions → |
| outsider | 1. someone who is excluded from or is not a member of a group 2. a contestant (human or animal) not considered to have a good chance to win More Definitions → |
| oversize | More Definitions → |
| occupant | 1. someone who lives at a particular place for a prolonged period or who was born there More Definitions → |
| ointment | 1. semisolid preparation (usually containing a medicine) applied externally as a remedy or for soothing an irritation 2. toiletry consisting of any of various substances in the form of a thick liquid that have a soothing and moisturizing effect when applied to the skin More Definitions → |
| ordinate | 1. the value of a coordinate on the vertical axis More Definitions → |
| oncogene | 1. a gene that disposes normal cells to change into cancerous tumor cells More Definitions → |
| overkill | 1. the capability to obliterate a target with more weapons (especially nuclear weapons) than are required 2. any effort that seems to go farther than would be necessary to achieve its goal More Definitions → |
| obsidian | 1. acid or granitic glass formed by the rapid cooling of lava without crystallization; usually dark, but transparent in thin pieces More Definitions → |
| optimise | More Definitions → |
| overturn | 1. the act of upsetting something 2. an improbable and unexpected victory More Definitions → |
| optimist | 1. a person disposed to take a favorable view of things More Definitions → |
| outburst | 1. an unrestrained expression of emotion 2. a sudden intense happening More Definitions → |
| obstruct | More Definitions → |
| odometer | 1. a meter that shows mileage traversed More Definitions → |
| oilfield | 1. a region rich in petroleum deposits (especially one with producing oil wells) More Definitions → |
| outfield | 1. the area of a baseball playing field beyond the lines connecting the bases More Definitions → |
| organist | 1. a person who plays an organ More Definitions → |
| overlord | 1. a person who has general authority over others More Definitions → |
| occupier | 1. someone who lives at a particular place for a prolonged period or who was born there 2. a member of a military force who is residing in a conquered foreign country More Definitions → |
| ottomans | 1. thick cushion used as a seat 2. a low seat or a stool to rest the feet of a seated person More Definitions → |
| overseer | 1. a person who directs and manages an organization More Definitions → |
| oxymoron | 1. conjoining contradictory terms (as in `deafening silence') More Definitions → |
| operatic | More Definitions → |
| overpass | 1. bridge formed by the upper level of a crossing of two highways at different levels More Definitions → |
| overhang | 1. projection that extends beyond or hangs over something else More Definitions → |
| oncoming | 1. the beginning or early stages More Definitions → |
| optician | 1. a worker who makes glasses for remedying defects of vision More Definitions → |
| objector | 1. a person who dissents from some established policy More Definitions → |
| outhouse | 1. a small outbuilding with a bench having holes through which a user can defecate More Definitions → |
| overcoat | 1. a heavy coat worn over clothes in winter 2. an additional protective coating (as of paint or varnish) More Definitions → |
| oxytocin | 1. hormone secreted by the posterior pituitary gland (trade name Pitocin); stimulates contractions of the uterus and ejection of milk More Definitions → |
| offshoot | 1. a natural consequence of development More Definitions → |
| oleander | 1. an ornamental but poisonous flowering shrub having narrow evergreen leaves and clusters of fragrant white to pink or red flowers: native to East Indies but widely cultivated in warm regions More Definitions → |
| omelette | 1. beaten eggs or an egg mixture cooked until just set; may be folded around e.g. ham or cheese or jelly More Definitions → |
| operetta | 1. a short amusing opera More Definitions → |
| opulence | 1. wealth as evidenced by sumptuous living More Definitions → |
| overheat | More Definitions → |
| oratorio | 1. a musical composition for voices and orchestra based on a religious text More Definitions → |
| oxidizer | 1. a substance that oxidizes another substance More Definitions → |
| ontogeny | 1. (biology) the process of an individual organism growing organically; a purely biological unfolding of events involved in an organism changing gradually from a simple to a more complex level More Definitions → |
| offsides | More Definitions → |
| overtone | 1. (usually plural) an ulterior implicit meaning or quality 2. a harmonic with a frequency that is a multiple of the fundamental frequency More Definitions → |
| overwork | 1. the act of working too much or too long More Definitions → |