13-Letter Words Matching ____RU_______

There are 19 13-letter words that match ____RU_______. 10 are common words, such as DESTRUCTIVELY and DISTRUSTFULLY. A rarer one is UNDERUTILIZES. In this set, I is the most frequent open letter (18 words). 3 words contain a doubled letter.

Full list 19

destructivelydistrustfullyinstructionalinstructivelyinstrumentalsinstrumentingmistrustfullyobstructivelyquadruplicaterestructuringcongruousnessgastrulationsunderutilizeddestructivityhyperurbanismhyperuricemiaquadrumviratequadruplicityunderutilizes

About this list

Words
19 (10 common words)
Common example
destructively
Rare example
underutilizes
Doubled letters
3
Ending in S
4
Most frequent letter
I (18)

Questions

How many 13-letter words matching ____ru_______ are there?

19. 10 of them are common words.

What is a common example?

DESTRUCTIVELY is among the common words in this set.