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One word substitution: 50 common words grouped by theme

A grouped list of 50 one word substitutions for people, places, government, sciences and killing, with tips for SSC.

Mock Matrix team8 Nov 2026 · 3 min read

How to prepare

One word substitution asks you to replace a phrase with a single word. The words are standard, and the same ones appear again and again. Learn them in groups, and pay attention to roots: -cide (killing), -cracy (rule), -logy (study), omni- (all), -phile (lover), mis- (hate in misanthrope and misogynist).

People

Description Word
One who works for the welfare of others Altruist
One who hates mankind Misanthrope
One who hates women Misogynist
One who loves mankind and gives generously to good causes Philanthropist
One who does not believe in God Atheist
One who believes that God’s existence cannot be known Agnostic
A lover of books Bibliophile
One who can speak many languages Polyglot
One who is unable to pay debts Insolvent
One who never drinks alcohol Teetotaller
One who eats too much Glutton
One who pretends to be what he is not Hypocrite
One who cannot be corrected or reformed Incorrigible
One who leaves his own country to settle in another Emigrant
One who comes into a country to settle there Immigrant
An expert judge in matters of taste, especially art Connoisseur

Places

Description Word
A place where birds are kept Aviary
A place where bees are kept Apiary
A place where grain is stored Granary
A place where weapons are stored Arsenal
A place where coins are made Mint
A place where historical records are kept Archives
A shelter for aircraft Hangar
A place where dead bodies are kept for identification Morgue
A place where monks live Monastery
A place where animals are slaughtered Abattoir

Government

Description Word
Government by the people Democracy
Government by one person with absolute power Autocracy
Government by a small group Oligarchy
Government by the wealthy Plutocracy
Government by religious leaders Theocracy
Government by officials Bureaucracy
Absence of government and order Anarchy

Sciences and studies

Description Word
Study of mankind Anthropology
Study of birds Ornithology
Study of insects Entomology
Study of the origin of words Etymology
Study of earthquakes Seismology
Study or collection of coins Numismatics
Collection and study of postage stamps Philately
The art of beautiful handwriting Calligraphy

Killing

Description Word
Killing of one’s mother Matricide
Killing of one’s father Patricide
Killing of one’s brother Fratricide
Killing of a king Regicide
Killing of a large group of people of one race or nation Genocide

Qualities and others

Description Word
All-powerful Omnipotent
All-knowing Omniscient
Incapable of making a mistake Infallible
Writing that cannot be read Illegible
A remedy for all ills Panacea
Happening after a person’s death Posthumous
Words written on a tomb Epitaph
A notice of a person’s death in a newspaper Obituary
Tip: SSC loves near pairs: aviary / apiary, entomology / etymology, emigrant / immigrant, epitaph / epithet. Learn these side by side.

Solved examples

  1. One who cannot be corrected: (a) incurable (b) incorrigible (c) invincible (d) infallible
    Answer: (b) incorrigible. “Incurable” is used for diseases.
  2. The study of insects: (a) etymology (b) entomology (c) ornithology (d) ecology
    Answer: (b) entomology. Etymology is the study of word origins.
  3. A place where bees are kept: (a) aviary (b) apiary (c) granary (d) nursery
    Answer: (b) apiary. An aviary is for birds.
Written byMock Matrix team

The Mock Matrix team writes exam strategy, study plans and previous-year paper analysis for government-exam aspirants.

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