Is knowledge an abstract noun?

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Tags

1. #thing
2. #nouns
3. #because
4. #opposite
5. #abstract
6. #class
7. #taste
8. #touch
9. #describes
10. #functions
11. #beyond
12. #experience
13. #something
14. #exists
15. #smell
16. #sentence
17. #senses
18. #these