1. Tremendous noise, disharmonious sound
Cacophony (n.)
Tremendous noise, disharmonious sound

2. Cajole (v.)
To urge, coax

3. Deleterious (adj.)
Harmful

4. To belittle, depreciate
Deprecate (v.)
To belittle, depreciate

5. Extremely lively, enthusiastic
Ebullient (adj.)
Extremely lively, enthusiastic

6. Egregious (adj.)
Extremely bad

7. Fallacious (adj.)
Incorrect, misleading

8. Fatuous (adj.)
Silly, foolish

9. Garrulous (adj.)
Talkative, wordy

10. Hapless (adj.)
Unlucky

11. Impenetrable, incapable of being affected
Impervious (adj.)
Impenetrable, incapable of being affected

13. Incapable of being persuaded or placated
Inexorable (adj.)
Incapable of being persuaded or placated
D.A.R.E.

14. Extremely joyful, happy
Jubilant (adj.)
Extremely joyful, happy

15. Deception, slight-of-hand
Legerdemain (n.)
Deception, slight-of-hand

16. Licentious (adj.)
Displaying a lack of moral or legal restraints

17. Limpid (adj.)
Clear, transparent

18. Maudlin (adj.)
Weakly sentimental

19. Mercurial (adj.)
Characterized by rapid change or temperamentally

20. Nefarious (adj.)
Heinously villainous

21. Parsimony (n.)
Frugality, stinginess