Allow suggesting more than one duplicate
1663
Allow same user to add multiple links as possible duplicates
22458
Add ability to flag answers as duplicates
139852
Dealing with suggested edits on question to be closed as duplicate
130688
Place a bounty to reward an answer on a duplicate (closed) question
138305
Automatically suggest asking on another site
66234
How do you put multiple things under a limit?
131299
Changes to "close as duplicate"
154006
Allow linking (suggested) edits to one comment
71476
How to deal with duplicate answers posted long after first answer(s)
77659
Prevent upvotes for duplicates, or carry upvotes to master question
2091
What's the incentive to flag duplicates?
10299
Circular duplicates in the close review queue?
151233
Why are duplicates not being merged?
154856
Wording of "possible/exact duplicates" when closing the question
51360
jQuery clone duplicate IDs
70613
“possible duplicate” comment should be re-added if it's been deleted
64726
Is it possible to type hint more than one type?