13-Letter Words Matching _______UN____

There are 12 13-letter words that match _______UN____. 3 are common words, such as BACKGROUNDERS and FOREGROUNDING. A rarer one is UNDERCOUNTING. 2 words contain a doubled letter.

Full list 12

backgroundersforegroundingsuperabundantcontrapuntistbackgroundingintermountainnoncommunistsoutreboundingpreannouncingrediscountingtransmountainundercounting

About this list

Words
12 (3 common words)
Common example
backgrounders
Rare example
undercounting
Doubled letters
2
Ending in S
2

Questions

How many 13-letter words matching _______un____ are there?

12. 3 of them are common words.

What is a common example?

BACKGROUNDERS is among the common words in this set.