13-Letter Words Matching _____U_____L_

There are 20 13-letter words that match _____U_____L_. 10 are common words, such as DESTRUCTIVELY and DISTRUSTFULLY. A rarer one is UNBEAUTIFULLY. In this set, I is the most frequent open letter (18 words). 10 words contain a doubled letter.

Full list 20

destructivelydistrustfullyhydraulicallyimpecuniouslyinstructivelyinstrumentalsinvoluntarilymistrustfullyobstructivelypronounceableinsinuatinglylatitudinallymanipulatableantiguerrillaaptitudinallyattitudinallyconfoundinglyquinquennialsunassuageableunbeautifully

About this list

Words
20 (10 common words)
Common example
destructively
Rare example
unbeautifully
Doubled letters
10
Ending in S
2
Most frequent letter
I (18)

Questions

How many 13-letter words matching _____u_____l_ are there?

20. 10 of them are common words.

What is a common example?

DESTRUCTIVELY is among the common words in this set.