7-letter words starting with O
Embark on a linguistic journey with words that begin with the letter O. This section showcases how O at the start shapes the identity and sound of various words. From commonly used terms to rare finds, explore the diverse range of words that start with O, enriching your vocabulary and appreciation for language.
| Word | Points | Definition | Sentence example |
|---|---|---|---|
| outside | 8 | outside a building | in summer we play outside |
| officer | 15 | any person in the armed services who holds a position of authority or command | an officer is responsible for the lives of his men |
| opinion | 9 | the reason for a court's judgment (as opposed to the decision itself) | - |
| opening | 10 | an open or empty space in or between things | there was a small opening between the trees |
| ordered | 9 | disposed or placed in a particular kind of order | - |
| obvious | 12 | easily perceived by the senses or grasped by the mind | obvious errors |
| offense | 13 | a transgression that constitutes a violation of what is judged to be right | - |
| operate | 9 | handle and cause to function | do not operate machinery after imbibing alcohol |
| observe | 12 | conform one's action or practice to | - |
| opposed | 12 | being in opposition or having an opponent | two bitterly opposed schools of thought |
| organic | 10 | a fertilizer that is derived from animal or vegetable matter | - |
| obliged | 11 | under a moral obligation to do something | - |
| oneself | 10 | A reflexive form of the indefinite pronoun one. Commonly writen as two words, one's self. | - |
| orleans | 7 | a long siege of Orleans by the English was relieved by Joan of Arc in 1429 | - |
| offence | 15 | a transgression that constitutes a violation of what is judged to be right | - |
| octopus | 11 | bottom-living cephalopod having a soft oval body with eight long tentacles | - |
| outcome | 11 | a phenomenon that follows and is caused by some previous phenomenon | - |
| overall | 10 | a loose protective coverall or smock worn over ordinary clothing for dirty work | - |
| obscene | 11 | suggestive of or tending to moral looseness | obscene telephone calls |
| orderly | 11 | a male hospital attendant who has general duties that do not involve the medical treatment of patients | - |
| overdue | 11 | past due; not paid at the scheduled time | an overdue installment |
| onstage | 8 | situated or taking place on the area of a stage visible to the audience | - |
| obscure | 11 | not drawing attention | an obscure flaw |
| ominous | 9 | presaging ill fortune | a dead and ominous silence prevailed |
| onwards | 11 | in a forward direction | - |
| outline | 7 | a sketchy summary of the main points of an argument or theory | - |
| outrage | 8 | the act of scandalizing | - |
| ongoing | 9 | currently happening | an ongoing economic crisis |
| outdoor | 8 | located, suited for, or taking place in the open air | outdoor clothes |
| orchard | 13 | garden consisting of a small cultivated wood without undergrowth | - |
| oatmeal | 9 | porridge made of rolled oats | - |
| outlook | 11 | a habitual or characteristic mental attitude that determines how you will interpret and respond to situations | - |
| outcast | 9 | excluded from a society | - |
| optical | 11 | relating to or using sight | an optical illusion |
| oversee | 10 | watch and direct | Who is overseeing this project? |
| overrun | 10 | flow or run over (a limit or brim) | - |
| odyssey | 14 | a Greek epic poem (attributed to Homer) describing the journey of Odysseus after the fall of Troy | - |
| outward | 11 | that is going out or leaving | an outward journey |
| ostrich | 12 | fast-running African flightless bird with two-toed feet; largest living bird | - |
| outpost | 9 | a station in a remote or sparsely populated location | - |
| outlive | 10 | live longer than | She outlived her husband by many years |
| overdid | 12 | - | - |
| obesity | 12 | more than average fatness | - |
| overlap | 12 | a flap that lies over another part | - |
| orbital | 9 | of or relating to an orbit | orbital revolution |
| outback | 15 | inaccessible and sparsely populated | - |
| ovation | 10 | enthusiastic recognition (especially one accompanied by loud applause) | - |
| origami | 10 | the Japanese art of folding paper into shapes representing objects (e.g., flowers or birds) | - |
| oddball | 11 | a person with an unusual or odd personality | - |
| offside | 14 | illegally beyond a prescribed line or area or ahead of the ball or puck | the touchdown was nullified because the left tackle was offside |
| ottoman | 9 | the Turkish dynasty that ruled the Ottoman Empire from the 13th century to its dissolution after World War I | - |
| optimum | 13 | most desirable possible under a restriction expressed or implied | an optimum return on capital |
| oeuvres | 10 | - | - |
| outdone | 8 | - | - |
| optimal | 11 | most desirable possible under a restriction expressed or implied | optimal concentration of a drug |
| oregano | 8 | aromatic Eurasian perennial | - |
| obelisk | 13 | a character used in printing to indicate a cross reference or footnote | - |
| oceanic | 11 | relating to or occurring or living in or frequenting the open ocean | oceanic islands like Bermuda |
| oppress | 11 | come down on or keep down by unjust use of one's authority | The government oppresses political activists |
| ourself | 10 | - | - |
| orifice | 12 | an aperture or hole that opens into a bodily cavity | the orifice into the aorta from the lower left chamber of the heart |
| osmosis | 9 | (biology, chemistry) diffusion of molecules through a semipermeable membrane from a place of higher concentration to a place of lower concentration until the concentration on both sides is equal | - |
| obverse | 12 | the more conspicuous of two alternatives or cases or sides | the obverse of this issue |
| omitted | 10 | - | - |
| ovarian | 10 | of or involving the ovaries | ovarian cancer |
| outrank | 11 | take precedence or surpass others in rank | - |
| opulent | 9 | ostentatiously rich and superior in quality | - |
| overlay | 13 | put something on top of something else | - |
| overtly | 13 | in an overt manner | he did it overtly |
| oblique | 18 | any grammatical case other than the nominative | - |
| oedipal | 10 | - | - |
| offbeat | 15 | (informal) strikingly unconventional | - |
| offhand | 17 | casually thoughtless or inconsiderate | an offhand manner |
| omicron | 11 | the 15th letter of the Greek alphabet | - |
| oversaw | 13 | - | - |
| outgrow | 11 | grow faster than | - |
| overact | 12 | exaggerate one's acting | - |
| oneness | 7 | the quality of being united into one | - |
| onerous | 7 | not easily borne; wearing | my duties weren't onerous; I only had to greet the guests |
| oratory | 10 | addressing an audience formally (usually a long and rhetorical address and often pompous) | he loved the sound of his own oratory |
| outlast | 7 | live longer than | - |
| overfed | 14 | too well nourished | - |
| onshore | 10 | (of winds) coming from the sea toward the land | an onshore gale |
| opossum | 11 | nocturnal arboreal marsupial having a naked prehensile tail found from southern North America to northern South America | - |
| oracles | 9 | - | - |
| overran | 10 | - | - |
| ovulate | 10 | produce and discharge eggs | women ovulate about once every month |
| offload | 14 | remove the load from (a container or vehicle) | offload the van |
| onetime | 9 | belonging to some prior time | - |
| outgrew | 11 | - | - |
| octagon | 10 | an eight-sided polygon | - |
| oddness | 9 | eccentricity that is not easily explained | - |
| orbiter | 9 | man-made equipment that orbits around the earth or the moon | - |
| outcrop | 11 | the part of a rock formation that appears above the surface of the surrounding land | - |
| overeat | 10 | overeat or eat immodestly; make a pig of oneself | - |
| oversea | 10 | beyond or across the sea | He lived overseas for many years |
| obviate | 12 | prevent the occurrence of; prevent from happening | - |
| overage | 11 | too old to be useful | - |
| omnibus | 11 | a vehicle carrying many passengers; used for public transport | - |
| oration | 7 | an instance of oratory | he delivered an oration on the decline of family values |
| overuse | 10 | exploitation to the point of diminishing returns | - |
| orangey | 11 | - | - |
| ousting | 8 | the act of ejecting someone or forcing them out | - |
| outflow | 13 | a natural flow of ground water | - |
| outtake | 11 | a scene that is filmed but is not used in the final editing of the film | - |
| outwith | 13 | - | - |
| oarsman | 9 | someone who rows a boat | - |
| oilskin | 11 | a macintosh made from cotton fabric treated with oil and pigment to make it waterproof | - |
| oldster | 8 | an elderly person | - |
| organon | 8 | a system of principles for philosophic or scientific investigations; an instrument for acquiring knowledge | - |
| outmost | 9 | situated at the farthest possible point from a center | - |
| outpace | 11 | surpass in speed | Malthus believed that population increase would outpace increases in the means of subsistence |
| outrace | 9 | - | - |
| overpay | 15 | pay too much | - |
| oculist | 9 | a medical doctor specializing in the diagnosis and treatment of diseases of the eye | - |
| opacity | 14 | the quality of being opaque to a degree; the degree to which something reduces the passage of light | - |
| outdrew | 11 | - | - |
| outstay | 10 | stay too long | overstay or outstay one's welcome |
| oxidant | 15 | a substance that oxidizes another substance | - |
| oersted | 8 | Danish physicist (1777-1851) | - |
| oftener | 10 | - | - |
| oldness | 8 | the opposite of youngness | - |
| onanist | 7 | a person who practices masturbation | - |
| oneiric | 9 | of or relating to or suggestive of dreams | - |
| operant | 9 | having influence or producing an effect | an operant conscience |
| ossuary | 10 | any receptacle for the burial of human bones | - |
| outface | 12 | overcome or cause to waver or submit by (or as if by) staring | - |
| outgrin | 8 | - | - |
| outswim | 12 | - | - |
| outtalk | 11 | - | - |
| outwork | 14 | subsidiary defensive structure lying outside the main fortified area | the outworks of the castle |
| overbid | 13 | (bridge) a bid that is higher than your opponent's bid (especially when your partner has not bid at all and your bid exceeds the value of your hand) | - |
| oxidize | 24 | enter into a combination with oxygen or become converted into an oxide | This metal oxidizes easily |
| oakiest | 11 | - | - |
| oakleaf | 14 | - | - |
| oaklike | 15 | - | - |
| oakling | 12 | - | - |
| oakmoss | 13 | - | - |
| oakwood | 15 | - | - |
| oarages | 8 | - | - |
| oarfish | 13 | thin deep-water tropical fish 20 to 30 feet long having a red dorsal fin | - |
| oariest | 7 | - | - |
| oarless | 7 | - | - |
| oarlike | 11 | - | - |
| oarlock | 13 | a holder attached to the gunwale of a boat that holds the oar in place and acts as a fulcrum for rowing | - |
| oarsmen | 9 | - | - |
| oarweed | 11 | - | - |
| oatcake | 13 | thin flat unleavened cake of baked oatmeal | - |
| oatiest | 7 | - | - |
| oatlike | 11 | - | - |
| obconic | 13 | - | - |
| obdured | 11 | - | - |
| obdures | 10 | - | - |
| obeahed | 13 | - | - |
| obeches | 14 | - | - |
| obeisms | 11 | - | - |
| obelias | 9 | - | - |
| obelion | 9 | the craniometric point on the sagittal suture near the lamboid suture | - |
| obelise | 9 | - | - |
| obelism | 11 | - | - |
| obelize | 18 | - | - |
| obentos | 9 | - | - |
| obesely | 12 | - | - |
| obesest | 9 | - | - |
| obeyers | 12 | - | - |
| obeying | 13 | - | - |
| obiisms | 11 | - | - |
| obitual | 9 | - | - |
| objects | 18 | - | - |
| objured | 17 | - | - |
| objures | 16 | - | - |
| oblasti | 9 | - | - |
| oblasts | 9 | - | - |
| oblates | 9 | - | - |
| obligee | 10 | - | - |
| obliger | 10 | someone who performs a service or does a favor | - |
| obliges | 10 | - | - |
| obligor | 10 | - | - |
| oblongs | 10 | - | - |
| obloquy | 21 | state of disgrace resulting from public abuse | - |
| oboists | 9 | - | - |
| obolary | 12 | - | - |
| obovate | 12 | (of a leaf shape) egg-shaped with the narrower end at the base | - |
| obovoid | 13 | - | - |
| obsequy | 21 | a ceremony at which a dead person is buried or cremated | - |
| obsigns | 10 | - | - |
| obtains | 9 | - | - |
| obtends | 10 | - | - |
| obtests | 9 | - | - |
| obtrude | 10 | thrust oneself in as if by force | - |
| obtunds | 10 | - | - |
| obtuser | 9 | - | - |
| obverts | 12 | - | - |
| ocarina | 9 | egg-shaped terra cotta wind instrument with a mouthpiece and finger holes | - |
| occiput | 13 | back part of the head or skull | - |
| occlude | 12 | block passage through | - |
| occults | 11 | - | - |
| oceanid | 10 | (Greek mythology) sea nymph who was a daughter of Oceanus and Tethys | - |
| ocellar | 9 | - | - |
| ocellus | 9 | an eye having a single lens | - |
| oceloid | 10 | - | - |
| ocelots | 9 | - | - |
| ochered | 13 | - | - |
| ochreae | 12 | - | - |
| ochreas | 12 | - | - |
| ochrier | 12 | - | - |
| ochring | 13 | - | - |
| ochroid | 13 | - | - |
| ochrous | 12 | - | - |
| ocicats | 11 | - | - |
| ocreate | 9 | - | - |
| octadic | 12 | - | - |
| octanes | 9 | - | - |
| octanol | 9 | - | - |
| octants | 9 | - | - |
| octapla | 11 | - | - |
| octaval | 12 | - | - |
| octaves | 12 | - | - |
| octavos | 12 | - | - |
| octette | 9 | eight performers or singers who perform together | - |
| octetts | 9 | - | - |
| octofid | 13 | - | - |
| octopod | 12 | a cephalopod with eight arms but lacking an internal shell | - |
| octrois | 9 | - | - |
| octuors | 9 | - | - |
| octuple | 11 | having eight units or components | - |
| octuply | 14 | - | - |
| oculars | 9 | - | - |
| oculate | 9 | - | - |
| odalisk | 12 | - | - |
| odaller | 8 | - | - |
| oddment | 11 | a piece of cloth that is left over after the rest has been used or sold | - |
| oddsman | 11 | - | - |
| oddsmen | 11 | - | - |
| odonata | 8 | dragonflies and damselflies | - |
| odonate | 8 | large primitive predatory aquatic insect having two pairs of membranous wings | - |
| odontic | 10 | - | - |
| odorant | 8 | - | - |
| odorate | 8 | - | - |
| odorful | 11 | - | - |
| odorise | 8 | - | - |
| odorize | 17 | cause to smell or be smelly | - |
| odorous | 8 | emitting an odor | odorous salt pork and weevily hardtack |
| odoured | 9 | - | - |
| odylism | 13 | - | - |
| odzooks | 21 | - | - |
| oecists | 9 | - | - |
| oedemas | 10 | - | - |
| oenomel | 9 | wine mixed with honey | - |
| oestral | 7 | - | - |
| oestrin | 7 | - | - |
| oestrum | 9 | - | - |
| oestrus | 7 | type genus of the Oestridae: sheep botflies | - |
| offcast | 15 | - | - |
| offcuts | 15 | - | - |
| offends | 14 | - | - |
| offered | 14 | - | - |
| offeree | 13 | - | - |
| offerer | 13 | someone who presents something to another for acceptance or rejection | - |
| offeror | 13 | someone who presents something to another for acceptance or rejection | - |
| offices | 15 | - | - |
| offings | 14 | - | - |
| offline | 13 | - | - |
| offpeak | 19 | - | - |
| offputs | 15 | - | - |
| offramp | 17 | - | - |
| offscum | 17 | - | - |
| offsets | 13 | - | - |
| offtake | 17 | - | - |
| ogdoads | 10 | - | - |
| oghamic | 15 | - | - |
| oglings | 9 | - | - |
| ogreish | 11 | - | - |
| ogreism | 10 | - | - |
| ogrisms | 10 | - | - |
| ohmages | 13 | - | - |
| oidioid | 9 | - | - |
| oikists | 11 | - | - |
| oilbird | 10 | nocturnal fruit-eating bird of South America that has fatty young yielding an oil that is used instead of butter | - |
| oilcamp | 13 | - | - |
| oilcans | 9 | - | - |
| oilcups | 11 | - | - |
| oilhole | 10 | - | - |
| oiliest | 7 | - | - |
| oillets | 7 | - | - |
| oilnuts | 7 | - | - |
| oilpans | 9 | - | - |
| oilseed | 8 | any of several seeds that yield oil | - |
| oilways | 13 | - | - |
| oinking | 12 | - | - |
| oinomel | 9 | - | - |
| ointing | 8 | - | - |
| okaying | 15 | - | - |
| okimono | 13 | - | - |
| oldened | 9 | - | - |
| oldwife | 14 | a common long-tailed sea duck of the northern parts of the United States | - |
| olearia | 7 | large genus of Australian evergreen shrubs or small trees with large daisylike flowers | - |
| oleates | 7 | - | - |
| olefine | 10 | any unsaturated aliphatic hydrocarbon | - |
| olefins | 10 | - | - |
| oleines | 7 | - | - |
| olestra | 7 | - | - |
| olfacts | 12 | - | - |
| olicook | 13 | - | - |
| oligist | 8 | - | - |
| olingos | 8 | - | - |
| olitory | 10 | - | - |
| olivary | 13 | - | - |
| olivers | 10 | - | - |
| olivets | 10 | - | - |
| olivine | 10 | a mineral consisting of magnesium iron silicate; a source of magnesium | - |
| ollamhs | 12 | - | - |
| ologies | 8 | - | - |
| ologist | 8 | - | - |
| ologoan | 8 | - | - |
| oloroso | 7 | - | - |
| olycook | 16 | - | - |
| olykoek | 18 | - | - |
| omelets | 9 | - | - |
| omening | 10 | - | - |
| omental | 9 | - | - |
| omentum | 11 | a fold of peritoneum supporting the viscera | - |
| omertas | 9 | - | - |
| omikron | 13 | - | - |
| omitter | 9 | - | - |
| ommatea | 11 | - | - |
| omneity | 12 | - | - |
| omniana | 9 | - | - |
| omniety | 12 | - | - |
| omnific | 14 | - | - |
| omniums | 11 | - | - |
| omphali | 14 | - | - |
| onagers | 8 | - | - |
| onanism | 9 | a method of birth control in which coitus is initiated but the penis is deliberately withdrawn before ejaculation | - |
| onbeats | 9 | - | - |
| onboard | 10 | - | - |
| oncogen | 10 | - | - |
| oncomes | 11 | - | - |
| oncosts | 9 | - | - |
| ondatra | 8 | muskrats | - |
| ondines | 8 | - | - |
| ondings | 9 | - | - |
| onefold | 11 | - | - |
| onerier | 7 | - | - |
| onesies | 7 | - | - |
| oneyers | 10 | - | - |
| oneyres | 10 | - | - |
| onfalls | 10 | - | - |
| onflows | 13 | - | - |
| onioned | 8 | - | - |
| onliest | 7 | - | - |
| onliner | 7 | - | - |
| onloads | 8 | - | - |
| onomast | 9 | - | - |
| onsides | 8 | - | - |
| onstead | 8 | - | - |
| onychas | 15 | - | - |
| onychia | 15 | - | - |
| onymous | 12 | bearing a name | articles in magazines are usually onymous |
| oocysts | 12 | - | - |
| oocytes | 12 | - | - |
| oodlins | 8 | - | - |
| oofiest | 10 | - | - |
| ooftish | 13 | - | - |
| oogonia | 8 | - | - |
| oohings | 11 | - | - |
| oolakan | 11 | - | - |
| oolites | 7 | - | - |
| ooliths | 10 | - | - |
| oolitic | 9 | - | - |
| oologic | 10 | - | - |
| oolongs | 8 | - | - |
| oomiack | 15 | - | - |
| oomiacs | 11 | - | - |
| oomiaks | 13 | - | - |
| oompahs | 14 | - | - |
| oophyte | 15 | - | - |
| ooralis | 7 | - | - |
| oorials | 7 | - | - |
| ooriest | 7 | - | - |
| oosiest | 7 | - | - |
| oosperm | 11 | - | - |
| oospore | 9 | a thick-walled sexual spore that develops from a fertilized oosphere in some algae and fungi | - |
| ootheca | 12 | - | - |
| ooziest | 16 | - | - |
| opacify | 17 | become opaque | the tissue in the eye's cornea may opacify and the patient may go blind |
| opacous | 11 | - | - |
| opaline | 9 | having a play of lustrous rainbow colors | a milky opalescent (or opaline) luster |
| opaqued | 19 | - | - |
| opaquer | 18 | - | - |
| opaques | 18 | - | - |
| opcodes | 12 | - | - |
| openers | 9 | - | - |
| openest | 9 | - | - |
| operand | 10 | a quantity upon which a mathematical operation is performed | - |
| operons | 9 | - | - |
| operose | 9 | characterized by effort to the point of exhaustion; especially physical effort | - |
| opgefok | 17 | - | - |
| ophites | 12 | - | - |
| ophitic | 14 | - | - |
| ophiura | 12 | - | - |
| opiated | 10 | - | - |
| opiates | 9 | - | - |
| opining | 10 | - | - |
| opioids | 10 | - | - |
| oporice | 11 | - | - |
| oppidan | 12 | - | - |
| opposer | 11 | someone who offers opposition | - |
| opposes | 11 | - | - |
| oppugns | 12 | - | - |
| opsonic | 11 | - | - |
| opsonin | 9 | an antibody in blood serum that attaches to invading microorganisms and other antigens to make them more susceptible to the action of phagocytes | - |
| optants | 9 | - | - |
| optimes | 11 | - | - |
| options | 9 | - | - |
| opuntia | 9 | large genus of cactuses native to America: prickly pears | - |
| opuscle | 11 | - | - |
| oquassa | 16 | - | - |
| oraches | 12 | - | - |
| oracies | 9 | - | - |
| oracled | 10 | - | - |
| oralism | 9 | - | - |
| oralist | 7 | - | - |
| orality | 10 | - | - |
| oranger | 8 | - | - |
| oranges | 8 | - | - |
| orarian | 7 | - | - |
| orarion | 7 | - | - |
| orarium | 9 | - | - |
| orating | 8 | - | - |
| orators | 7 | - | - |
| oratrix | 14 | - | - |
| orature | 7 | - | - |
| orbiest | 9 | - | - |
| orbitas | 9 | - | - |
| orbited | 10 | - | - |
| orbless | 9 | - | - |
| orblike | 13 | - | - |
| orceins | 9 | - | - |
| orchats | 12 | - | - |
| orchels | 12 | - | - |
| orchids | 13 | - | - |
| orchils | 12 | - | - |
| orcines | 9 | - | - |
| orcinol | 9 | - | - |
| ordains | 8 | - | - |
| ordeals | 8 | - | - |
| orderer | 8 | an organizer who puts things in order | Aristotle was a great orderer of ideas |
| ordinal | 8 | the number designating place in an ordered sequence | - |
| ordinar | 8 | - | - |
| ordinee | 8 | - | - |
| ordines | 8 | - | - |
| ordures | 8 | - | - |
| oreades | 8 | - | - |
| orebody | 13 | - | - |
| orectic | 11 | - | - |
| oreides | 8 | - | - |
| oreweed | 11 | - | - |
| orexins | 14 | - | - |
| orfrays | 13 | - | - |
| organdy | 12 | a sheer stiff muslin | - |
| organum | 10 | - | - |
| organza | 17 | a fabric made of silk or a silklike fabric that resembles organdy | - |
| orgasms | 10 | - | - |
| orgeats | 8 | - | - |
| orgiast | 8 | - | - |
| orgones | 8 | - | - |
| oriency | 12 | - | - |
| orients | 7 | - | - |
| origane | 8 | - | - |
| origans | 8 | - | - |
| origins | 8 | - | - |
| orihous | 10 | - | - |
| orioles | 7 | - | - |
| orishas | 10 | - | - |
| orisons | 7 | - | - |
| ormolus | 9 | - | - |
| ornater | 7 | - | - |
| ornises | 7 | - | - |
| orogens | 8 | - | - |
| orogeny | 11 | the process of mountain formation (especially by the upward displacement of the earth's crust) | - |
| oroides | 8 | - | - |
| orology | 11 | the science of mountains | - |
| oropesa | 9 | - | - |
| orotund | 8 | (of sounds) full and rich | orotund tones |
| orphans | 12 | - | - |
| orphism | 14 | - | - |
| orphrey | 15 | a richly embroidered edging on an ecclesiastical vestment | - |
| orpines | 9 | - | - |
| orraman | 9 | - | - |
| orramen | 9 | - | - |
| orrices | 9 | - | - |
| orrises | 7 | - | - |
| orthian | 10 | - | - |
| orthros | 10 | - | - |
| ortolan | 7 | brownish Old World bunting often eaten as a delicacy | - |
| oscheal | 12 | - | - |
| oscines | 9 | two names for the suborder of typical songbirds | - |
| oscular | 9 | - | - |
| oscules | 9 | - | - |
