Countries, US States, Capitals, Elements: similar answers

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You have to list all answer pairs having Levenshtein distance no greater than 1 that are at least 5 letters long.
In other words, all answers that appear twice and answers that are identical except changing/removing one letter.

Answers are sorted by distance, then by answer A, then by answer B. Answer A comes before answer B alphabetically.
I got the idea from a similar quiz but I can't find it any more
Informally, the Levenshtein distance between two words is the minimum number of single-character edits (insertions, deletions or substitutions) required to change one word into the other.
Quiz by scambigol
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Last updated: November 8, 2018
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First submittedNovember 8, 2018
Times taken56
Average score30.8%
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IDENTICAL
Djibouti
Georgia
Luxembourg
Monaco
San Marino
Singapore
Vatican City
A
B
Cerium
Cesium
Cerium
Curium
Colombia
Columbia
Could
Would
Erbium
Terbium
Gambia
Zambia
Iceland
Ireland
Kingston
Kingstown
Manama
Panama
There
These
+1
Level 68
Nov 8, 2018
Great quiz! Referring to your caveat, was it this quiz by WolfCam by any chance?
+1
Level 76
Nov 8, 2018
Thanks! No, it wasn't that quiz, it was a recent one which mentioned this 'measuring distance' methods (Levenshtein or maybe some other one?) that I had never heard of before