14-Letter Words Matching U_________L___

There are 13 14-letter words that match U_________L___. 3 are common words, such as UNAVAILABILITY and UNDESIRABILITY. A rarer one is UPGRADEABILITY. In this set, I is the most frequent open letter (13 words). 2 words contain a doubled letter.

Full list 13

unavailabilityundesirabilityunflappabilityunalterabilityunavoidabilityundecidabilityunpalatabilityuntouchabilityultramasculineunbusinesslikeuncongenialityunthinkabilityupgradeability

About this list

Words
13 (3 common words)
Common example
unavailability
Rare example
upgradeability
Doubled letters
2
Ending in S
0
Most frequent letter
I (13)

Questions

How many 14-letter words matching u_________l___ are there?

13. 3 of them are common words.

What is a common example?

UNAVAILABILITY is among the common words in this set.