One word Substitution (O), Study Notes, Material - DSSSB exam

By Neha Joshi|Updated : August 11th, 2022

One word Substitution is an important part of the English section for REETUPTETCTETSuper TETDSSSBKVS etc. We can expect at least 2 to 3 questions from the topic of Idioms & Phrase. One word Substitution is an important topic of the English section. 2-3 questions are expected from this topic. 

We are sharing some important One-word Substitution from the letter 'O' which will very helpful to score good marks in the exam.

Vocabulary Special: Important One-word Substitution (O)

  1. Obstetrician
    Meaning in Hindi:- दाई 
    Meaning in English:- One expert in the delivery of women

  2. Osteology 
    Meaning in Hindi:- अस्थि विज्ञान
    Meaning in English:- A branch of medical science that deals with the study of bones

  3. Oculist 
    Meaning in Hindi:- नेत्र-विशेषज्ञ 
    Meaning in English:- One skilled in the disease of eyes

  4. Oligarchy 
    Meaning in Hindi:- कुलीनतंत्र 
    Meaning in English:- A rule or government by a small group of people

  5. Obsolete 
    Meaning in Hindi:- अप्रचलित 
    Meaning in English:- Out of use

  6. Omniscient 
    Meaning in Hindi:- सर्वज्ञ 
    Meaning in English:- One who knows everything

  7. Orphanage 
    Meaning in Hindi:- अनाथालय 
    Meaning in English:- An institution for the shelter of orphans

  8. Orphan 
    Meaning in Hindi:- अनाथ 
    Meaning in English:- A child whose parents died

  9. Orthodox 
    Meaning in Hindi:- रूढ़िवादी 
    Meaning in English:- A person holding conversational belief especially in the matter of religion

  10. Omnipotent 
    Meaning in Hindi:- सर्वशक्तिमान 
    Meaning in English:- One who has great power and most powerful 

  11. Opaque 
    Meaning in Hindi:- अपारदर्शी 
    Meaning in English:- Not able to be seen through; not transparent 

  12. Optimist 
    Meaning in Hindi:- आशावादी 
    Meaning in English:- An optimist is someone who always sees the bright side of any situation

  13. Oath 
    Meaning in Hindi:- शपथ 
    Meaning in English:- Solemn undertaking with God’s help to do something

  14. Outriders 
    Meaning in Hindi:- पूलिस का आदमी 
    Meaning in English:- Policemen riding on motorcycles as guards

You may read the following books:

Serial No.Book NameAuthor Name
1.One Word SubstitutionRoshan Tolani
2.One Word SubstitutionAtharv Publication



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Frequently Asked Questions (FAQs)



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  •  The weightage of One word Substitution in the DSSSB exam- 3 to 4 marks.

  • The weightage of the English Section in the DSSSB exam is 20 marks.

  • Yes, negative marking involves in the DSSSB exam (0.25 marks)

  • The level of One Word Substitution Asked in the exam will be moderate.

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