Is OK a word in Scrabble?

Related questions

1. WHY ARE ALL CAPS BAD?
2. What is difference between OK and okay?
3. Why is OK in capitals?
4. Who created OK?
5. Is okay a formal word?
6. Does OK stand for anything?
7. Is it okay or okay?
8. Is yes and yeah the same thing?
9. Is okay a slang word?
10. Does OK stands for objection killed?

Tags

1. #making
2. #highest
3. #scrabble
4. #playable
5. #formerly
6. #recognized
7. #players
8. #levels
9. #variant
10. #accepted
11. #lowercase
12. #however
13. #especially
14. #where
15. #established