TOEFL (vocabulary) synonym/antonym practice test 9 of 31

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Question 1 of 10: Identify the synonyms/antonyms of "catalyst".


1. hindrance

2. impulse

3. block

4. agitator

5. radical stimulus

6. goad

7. incitement

8. prevention

9. stimulant

10. impetus

11. reactant

12. preventer

13. adjuvant

14. incitation

15. blockage

16. wave maker

17. spark plug

18. anticatalyst

19. enzyme

20. reactionary

21. spur

22. motivation

23. incendiary

24. incentive

25. synergist

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