Introduction
This article is a collection of all important words starting with letter O. The letter O words list is a good resource for individuals working towards enhancing their vocabulary. Also the letter O words list is a splendid read for the candidates pursuing different competitive exams including but not limited to GRE, TOEFL, GMAT, CAT, etc.. Below presented is the letter O words list along with synonyms and antonyms.
| Word | Meaning | Synonyms | Antonyms | Usage of Word |
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| Oaf (Noun) | stupid awkward person |
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A oaf is the exhausting, rude individual you trust doesn't appear at your gathering and send alternate visitors running for the entryway. Example: “They are just big, clumsy oafs”. |
| Oath (Noun) |
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A oath is a guarantee. On the off chance that you need to get your sibling's auto, you may need to swear a grave pledge that you will bring it back unharmed. Example: “They took a oath of faithfulness to the lord”. |
| Oatmeal (Noun) | crushed oats used for making porridge |
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Utilize the word oatmeal for ground, squashed, or cut oats — or to mean the hot oat produced using cooking these handled oats. You may incline toward your cereal with chestnut sugar and raisins. Example: “Medium Scottish oatmeal”. |
| Obdurate (Adj) |
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Obdurate is a formal word meaning resolved. In the event that you need to major in English, however your folks are headstrong that you ought to go premed, they may go so far as to debilitate not to pay your educational cost. Example: “I contended this point with him, however he was obdurate”. |
| Obeisance (Noun) | Bow (to show respect and obedience) |
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A obeisance is a demonstration, generally physical, indicating devoted submission. A supplicant may perform regard, touching his face to the ground, before modestly requesting help. Example: “They paid obeisance to the Prince”. |
| Obelisk (Noun) | Tall column tapering(becoming gradually narrower toward the end) and ending in a pyramid. |
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Next time you visit the countries capital, you can wow sightseers by letting them know the Washington Monument is a obelisk — a tall, slender stone column that decreases to a point at the top and remembers an imperative individual or occasion. Example: “landmark or point of interest". |
| Obese (Adj) | excessively fat |
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Obese means exorbitantly fat. In therapeutic terms, it implies you have a body mass list (BMI) of 30 or more, and soon thereafter your body's overabundance fat starts to debilitate your well being. Example: “A gigantically obese young fellow”. |
| Obfuscate (Verb) |
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Some individuals are specialists at obfuscating reality by being shifty, vague, or dark in the recounting the certainties. Example: “The new manage will probably obfuscate individuals than edify them”. |
| Objective (Adj) |
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A objective is something you plan to accomplish. A military target is the general arrangement for a mission. The goal for a prepare deal is to raise cash. In the event that your goal is to take in another word, you have succeeded. Example: “Students of history attempt to be objective and fair-minded”. |
| Obligatory (Adj) |
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Obligatory portrays something you do on the grounds that you need to, not on account of you need to. When you purchase an auto, you need to round out the mandatory structures. In numerous homes, saying please and thank you is required. Example: “Utilization of safety belts in autos is currently obligatory”. |
| Oblique (Adj/Noun) |
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In the case of something is oblique, it has an inclining position or heading. In allegorical use, diagonal means circuitous or intentionally deceptive. "What is two in addition to two" "Fish!" as an answer is totally diagonal. Example: “He issued a oblique assault on the President”. |
| Obliterate (Verb) |
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When you see obliterate, consider detestable outsider intruders that zap a planet with a dangerous beam. In one impact, the planet and the majority of the general population on it are vaporized. Example: “The memory was painful to the point that he obliterated it from his psyche” |
| Oblivion (Noun) |
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Oblivion is the condition of being overlooked. In the event that you slip into blankness in the wake of offering one record, then your exclusive trust is turning into a "VH1 one-hit wonder". Example: “They drank themselves into oblivion” |
| Oblivious (Adj) |
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On the off chance that you don't see or aren't mindful, it implies that the oblivious word absent applies to you! Example: “she got to be ingested, oblivious in regards to the progression of time”. |
| Obloquy (Noun) |
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On the off chance that you are forced to bear obloquy, then society has betrayed you and you are in a condition of disfavor. Poor Hester Prynne who was compelled to wear a red "An" on her mid-section for "infidelity" thoroughly understands obloquy. Example: “He persisted years of disdain and obloquy”. |
| Obnoxious (Adj) |
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In the case of something is obnoxious, it's irritating and obnoxious. For the most part, individuals like to keep away from repulsive people. Example: “obnoxious smells". |
| Obscure (Adj/Verb) |
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In the case of something is obscure, it's obscure and difficult to see. Be watchful in case you're driving in substantial downpour — the painted lines can be dark. Example: “His causes and parentage are obscure”. |
| Obsequious (Adj) |
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On the off chance that you dislike the excessively accommodating way somebody is acting — like the prude or a VIP's collaborator — call them by the formal descriptive word submissive. Example: “They were served by obsequious servers”. |
| Obsequy (Adj) | Funeral ceremony |
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On the off chance that you are forced to bear obloquy, then society has betrayed you and you are in a condition of disfavor. Example: “A memorial service custom or function”. |
| obsessive (Adj/Noun) |
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In the event that you are forced to bear obloquy, then society has betrayed you and you are in a condition of disrespect. Example: “Individuals stubborn by obsessive desire”. |
| Obsidian (Adj) | Black volcanic rock |
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Obsidian is a kind of dark or dull glass shaped from cooling magma. So in the event that you locate a sparkly, hard, dull bit of glass next time you're staying nearby a spring of gushing lava, it's presumably a bit of obsidian. Example: “obsidian is an unmistakable stone”. |
| Obsolete (Adj/Noun) |
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Utilize the descriptor obsolete something that is obsolete. As the Rolling Stones melody "Out of Time" goes, "You&'re old, my child, my poor out-dated infant". Example: “The transfer of old and obsolete apparatus”. |
| Obstetrician (Noun) | Physician specializing in delivery(assisting in giving birth) of babies |
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In the event that you were conceived in the United States, likely the primary specialist you ever looked at was an obstetrician, a restorative specialist who conveys babies. Example: “A doctor or specialist qualified to rehearse in obstetrics.”. |
| Obstinate (Adj) |
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When somebody is past determined, utilize the word obstinate rather: "You willful old donkey! Escape my direction!" Example: “Her obstinate determination to seek after a profession in radio.”. |
| Obstreperous (Adj) |
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Obstreperous means riotous, boisterous, forceful, disobedient. You've presumably seen an obstreperous kid in the supermarket, pulling far from her mom, shouting as loud as possible. Example: “The kid is presumptuous and obstreperous”. |