One Word Substitution
100+ High-Frequency Words · Grouped by Category · Root Logic · Confusables
OWS is the most directly learnable section of competitive English — every word has a fixed definition. This guide groups them by category so you learn clusters, not isolated words, and explains the Latin/Greek roots so you can decode words you have never seen.
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One Word Substitution Database — 160+ words, search & filter by category
Type any phrase to instantly find the word. Covers People, Phobias, Government, Crime, Language, Science & more.
How to Approach OWS in Exams
Learn roots, not just words
The root 'kratos' means rule. Once you know it, you can decode any '-cracy' word: democracy, plutocracy, gerontocracy — even ones you have never seen. Latin/Greek roots unlock 60% of advanced English vocabulary.
Learn in categories, not alphabetically
All government-system words end in '-cracy' or '-archy'. All study-of fields end in '-ology'. All fear words end in '-phobia'. Learning by category means you can narrow options immediately — if the phrase says 'fear of', you know the answer ends in '-phobia'.
Eliminate with prefix/suffix logic
If you don't know the exact word, eliminate options using what you do know. 'Poly-' means many — so 'polyandry' and 'polygyny' both involve multiple partners. 'Mis-' or 'miso-' means hate — so misanthrope, misogynist, and misogamist all describe forms of hatred.
The confusable pairs are the exam's weapon
Setters deliberately put the confusable near-synonym as an option. Soliloquy vs Monologue, Polyandry vs Polygyny, Entomology vs Etymology — these pairs appear as distractors. Study the confusables table below as its own revision unit.
In SSC CGL: 3–5 OWS questions per paper, always direct
A phrase is given; choose the one-word equivalent. There are no context sentences. The only information is the phrase itself. If you know the word, you score in 10 seconds. OWS is one of the highest-ROI topics in the English section.
The Mega List — 100+ Words by Category
Root explanations shown in brackets where applicable. These roots repeat across many words — learn the root once, unlock many words.
| Word | Phrase / Definition |
|---|---|
| Ambidextrous | Able to use both hands with equal ease |
| Altruistic | One who is concerned for the welfare of others |
| Egotist | One who is excessively self-centred |
| Misanthrope | One who hates or distrusts mankind |
| Philanthropist | One who loves and helps mankind |
| Stoic | One who is indifferent to both pleasure and pain |
| Hedonist | One who believes pleasure is the highest good |
| Ascetic | One who leads a life of severe self-discipline |
| Celibate | One who voluntarily abstains from marriage |
| Recluse | One who lives a solitary, retired life |
| Somnambulist | One who walks in sleep |
| Insomniac | One who is unable to sleep |
| Somniloquist | One who talks in sleep |
| Introvert | One who tends to focus on inner thoughts and feelings |
| Extrovert | One who is outgoing and socially confident |
| Word | Phrase / Definition |
|---|---|
| Autocracy | Government by one person with absolute power |
| Democracy | Government by the people |
| Plutocracy | Government by the wealthy |
| Theocracy | Government by religious authority |
| Oligarchy | Government by a small group of people |
| Meritocracy | Government by those with ability and talent |
| Anarchy | Absence of government or social order |
| Bureaucracy | Government by officials following rigid procedures |
| Gerontocracy | Government by old men |
| Kleptocracy | Government by those who use power to steal |
| Word | Phrase / Definition |
|---|---|
| Acrophobia | Fear of heights |
| Agoraphobia | Fear of open or public spaces |
| Claustrophobia | Fear of enclosed spaces |
| Xenophobia | Fear or hatred of foreigners |
| Hydrophobia | Fear of water |
| Pyrophobia | Fear of fire |
| Nyctophobia | Fear of darkness or night |
| Cynophobia | Fear of dogs |
| Necrophobia | Fear of death or dead bodies |
| Bibliophobia | Fear of books |
| Word | Phrase / Definition |
|---|---|
| Pyromania | Obsessive desire to set fire to things |
| Kleptomania | Compulsive urge to steal |
| Megalomania | Obsession with one's own power or importance |
| Bibliophilia | Love of books |
| Dipsomania | Uncontrollable craving for alcohol |
| Cacomania | Obsession with evil |
| Logomania | Obsessive talkativeness |
| Egomania | Obsessive preoccupation with oneself |
| Word | Phrase / Definition |
|---|---|
| Palindrome | A word or phrase that reads the same forwards and backwards |
| Anagram | A word formed by rearranging the letters of another word |
| Acronym | A word formed from the initial letters of other words |
| Homophone | Two words that sound alike but differ in meaning or spelling |
| Euphemism | A mild or indirect expression substituted for a harsh one |
| Soliloquy | A speech made to oneself when alone |
| Monologue | A long speech by one person to an audience |
| Eulogy | A speech praising a person, especially at their funeral |
| Elegy | A mournful poem or song lamenting the dead |
| Epigraph | An inscription on a building or statue |
| Epitaph | Words inscribed on a tombstone |
| Epigram | A short witty poem or saying |
| Pseudonym | A fictitious name used by an author |
| Autobiography | The story of one's own life written by oneself |
| Bibliography | A list of books or sources on a subject |
| Word | Phrase / Definition |
|---|---|
| Monastery | A place where monks live as a community |
| Convent | A place where nuns live as a community |
| Seminary | A college for the training of priests or ministers |
| Dormitory | A large sleeping room with many beds |
| Mortuary | A place where dead bodies are kept before burial |
| Infirmary | A place for the care of the sick |
| Aviary | A large cage or building for keeping birds |
| Aquarium | A tank or building for keeping fish and aquatic animals |
| Apiary | A place where bees are kept |
| Granary | A storehouse for grain |
| Armoury | A place where weapons are stored |
| Menagerie | A collection of wild animals kept in captivity for exhibition |
| Word | Phrase / Definition |
|---|---|
| Polyandry | The practice of a woman having more than one husband |
| Polygyny | The practice of a man having more than one wife |
| Bigamy | The crime of marrying again while still legally married |
| Posthumous | Occurring after death (of a child, book, or award) |
| Orphan | A child whose parents are both dead |
| Prodigy | A person with exceptional ability at an unusually young age |
| Veteran | A person who has long experience in a field or military service |
| Amateur | One who engages in something without professional skill or pay |
| Novice | A person new to or inexperienced in a field |
| Connoisseur | An expert judge in matters of taste |
| Word | Phrase / Definition |
|---|---|
| Genetics | The science of heredity and the laws of inheritance |
| Eugenics | The science of improving the genetic qualities of a population |
| Pathology | The science of the causes and effects of diseases |
| Ornithology | The scientific study of birds |
| Entomology | The scientific study of insects |
| Toxicology | The branch of science dealing with poisons |
| Seismology | The study of earthquakes |
| Etymology | The study of the origin and history of words |
| Necromancy | Communication with the dead, especially to predict the future |
| Autopsy | An examination of a dead body to determine cause of death |
Most Confused Pairs — Exam Traps
These pairs are used as distractors in the same question. Know the exact distinction.
| Word A | Word B | Key distinction |
|---|---|---|
| Soliloquy | Monologue | Soliloquy = alone, no audience present. Monologue = to an audience. |
| Monastery | Convent | Monastery = monks (male). Convent = nuns (female). |
| Polyandry | Polygyny | Polyandry = one woman, many husbands. Polygyny = one man, many wives. |
| Epitaph | Epigraph | Epitaph = on a tombstone. Epigraph = on any building or statue. |
| Elegy | Eulogy | Elegy = mournful poem. Eulogy = speech praising the dead (or living). |
| Genetics | Eugenics | Genetics = science of heredity. Eugenics = selective breeding of humans. |
| Entomology | Etymology | Entomology = study of insects. Etymology = study of word origins. |
| Ornithology | Oncology | Ornithology = study of birds. Oncology = study of cancer. |
| Xenophobia | Agoraphobia | Xenophobia = fear/hatred of foreigners. Agoraphobia = fear of open spaces. |
| Misogynist | Misanthrope | Misogynist = hates women specifically. Misanthrope = hates all mankind. |
Essential Latin & Greek Roots for OWS
| Root | Meaning | OWS words that use it |
|---|---|---|
| kratos / cracy | rule / government | democracy, plutocracy, autocracy, theocracy |
| phobos / phobia | fear | acrophobia, agoraphobia, xenophobia, hydrophobia |
| mania | obsession / madness | pyromania, kleptomania, megalomania, dipsomania |
| logos / logy | study / word | ornithology, entomology, etymology, pathology |
| philos / philia | love | bibliophilia, philanthropist, anglophile |
| misos / mis | hate | misanthrope, misogynist, misogamy |
| anthropos | human / mankind | misanthrope, philanthropist, anthropology |
| gyne | woman | polygyny, misogynist, gynaecology |
| andros | man | polyandry, android, philanderer |
| somnus | sleep | somnambulist, insomniac, somniloquist |
| graphein | write | autobiography, bibliography, epigraph |
| loqui | speak | soliloquy, somniloquist, loquacious, eloquent |
| nekros | dead | necromancy, necrophobia, necropolis |
| autos | self | autocracy, autobiography, autopsy, autonomy |
| epi | upon / after | epitaph, epigraph, epigram, epidemic |
Practice Quiz — 10 Questions
A phrase is given — choose the correct one-word equivalent. Root explanation shown after each answer.
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