The part of speech
Provide the part of speech, definition, and an original example sentence using the word for the following list. Don't forget to cite your work.
1. Plagiarism
2. Plethora
3. Posthumously
4. Preposition
5. Pretentious
6. Pseudonym
7. References
8. Reflection
9. Rubric
10. Sardonic
11. Satire
12. Simile
13. Soliloquy
14. Superfluous
15. Syntax
16. Thesis
17. Validity
18. Vernacular
19. Virtual
20. Vocational
21. Volition
22. Voracious
23. Wane
24. Wary
25. Xenophobe
26. Xeric
27. Yammer
28. Yaw
29. Zealot
30. Zest