What do flames mean in Words With Friends?

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Tags

1. #words
2. #emoji
3. #friends
4. #streak
5. #player
6. #another
7. #still
8. #feature
9. #multiple
10. #other
11. #flame
12. #opponent
13. #affect
14. #between
15. #operates
16. #events
17. #games
18. #ongoing
19. #single
20. #moreover
21. #therefore
22. #progress