⤵️One-word Substitution

1. The life history of a man written by himself. - Autobiography (आत्मकथा)

2. A person who believes that there is no God. - Atheist (नास्तिक)

3. A medicine which counteracts the effects of the poison. - Antidote (जहर मारने की दवा)

4. A person who does something not professionally but for pleasure. -Amateur (अव्यवसायी) 

5. That which does not bear the name of the writer. - Anonymous (बिना नाम का)

6. Government by a ruler who has unlimited power. - Autocracy (एक व्यक्ति का शासन)

7. A diplomatic representative of one country in another. - Ambassador (राजदूत)

8. A traveler in space. - Astronaut (अंतरिक्ष यात्री)

9. An assembly of listeners. - Audience (श्रोतागण)

10. To give up the throne. - Abdicate (राज्य त्यागना)

11. A medicine which prevents infection by killing germs. - Antiseptic (सड़न रोकने वाली)

12. The science of vegetable life.  - Botany (वनस्पति-विज्ञान)

13. The science which treats of life. - Biology (जीव विज्ञान)

14. Government by officials. - Bureaucracy (अफसरशाही)

15. The life history of a man written by someone else. - Biography (जीवन कथा)

16. One who has narrow and prejudiced religious views. - Bigot (कट्टर)

17. Festival of the hundredth anniversary. - Centenary (शताब्दी महोत्सव)

18. The man who eats human flesh. - Cannibal (नरभक्षी)

19. Place for burials other than a churchyard. - Cemetery (कब्रिस्तान)

20. Place for cremation of dead bodies. - Crematorium (शमशान)  

21. A Person who is free from national prejudices. - Cosmopolitan (विश्वप्रेमी)

22. People working together in the same office or department. - Colleagues (सहकर्मी)

21. Belonging to the same time.  - Contemporary (समकालीन)

22. A substance designed to make the skin or hair more beautiful. - Cosmetics (सौंदर्य प्रसाधन)

23. That can be believed. - Credible (विश्वसनीय)