12-Letter Words Matching U________D__

There are 13 12-letter words that match U________D__. 5 are common words, such as UNAFFECTEDLY and UNCOMPOUNDED. A rarer one is URETHRITIDES. In this set, E is the most frequent open letter (13 words). 3 words contain a doubled letter.

Full list 13

unaffectedlyuncompoundedundeservedlyunexpectedlyunreservedlyunderstanderunmanneredlyunpreparedlyunrelievedlyunrequitedlyunbarricadedunconfoundedurethritides

About this list

Words
13 (5 common words)
Common example
unaffectedly
Rare example
urethritides
Doubled letters
3
Ending in S
1
Most frequent letter
E (13)

Questions

How many 12-letter words matching u________d__ are there?

13. 5 of them are common words.

What is a common example?

UNAFFECTEDLY is among the common words in this set.