15-Letter Words Matching ____RU_________

There are 22 15-letter words that match ____RU_________. 12 are common words, such as DESTRUCTIBILITY and DESTRUCTIVENESS. A rarer one is QUADRUPLICITIES. 7 words contain a doubled letter.

Full list 22

destructibilitydestructivenessdisgruntlementsinscrutablenessinstrumentalistinstrumentalityinstrumentationobstructionismsobstructionistsobstructivenessquadruplicatingquadruplicationcongruousnessesdistrustfulnessinstructorshipsinstrumentalismmistrustfulnessdestructionistsdestructivitiesinstructivenessinteruniversityquadruplicities

About this list

Words
22 (12 common words)
Common example
destructibility
Rare example
quadruplicities
Doubled letters
7
Ending in S
14

Questions

How many 15-letter words matching ____ru_________ are there?

22. 12 of them are common words.

What is a common example?

DESTRUCTIBILITY is among the common words in this set.