11-Letter Words Matching U_________R

There are 12 11-letter words that match U_________R. 8 are common words, such as UNCLEANLIER and UNDERWRITER. A rarer one is UNSCRAMBLER. In this set, E is the most frequent open letter (12 words). 3 words contain a doubled letter.

Full list 12

uncleanlierunderwriterunearthlierunhealthierunicellularunsightlierunworldlierupholstereruninstallerultrafilterunderbidderunscrambler

About this list

Words
12 (8 common words)
Common example
uncleanlier
Rare example
unscrambler
Doubled letters
3
Ending in S
0
Most frequent letter
E (12)

Questions

How many 11-letter words matching u_________r are there?

12. 8 of them are common words.

What is a common example?

UNCLEANLIER is among the common words in this set.