13-Letter Words Matching _____U__N____

There are 22 13-letter words that match _____U__N____. 6 are common words, such as ATTITUDINIZED and ATTITUDINIZES. A rarer one is QUINQUENNIUMS. In this set, I is the most frequent open letter (20 words). 12 words contain a doubled letter.

Full list 22

attitudinizedattitudinizesinstrumentalsinstrumentingreacquaintingrestauranteurattitudinizerconglutinatedconglutinatesintegumentarylatitudinallyantihumanismsaptitudinallyattitudinallyattitudinisedattitudinisesbourguignonnemucocutaneousphillumenistspococurantismquinquennialsquinquenniums

About this list

Words
22 (6 common words)
Common example
attitudinized
Rare example
quinquenniums
Doubled letters
12
Ending in S
9
Most frequent letter
I (20)

Questions

How many 13-letter words matching _____u__n____ are there?

22. 6 of them are common words.

What is a common example?

ATTITUDINIZED is among the common words in this set.