15-Letter Words Matching I____U_________

There are 16 15-letter words that match I____U_________. 9 are common words, such as IMPECUNIOUSNESS and IMPETUOUSNESSES. A rarer one is INTERUNIVERSITY. 9 words contain a doubled letter.

Full list 16

impecuniousnessimpetuousnessesingenuousnessesinnocuousnessesinscrutablenessinstrumentalistinstrumentalityinstrumentationinvoluntarinessinstructorshipsinstrumentalismimpecuniositiesinexcusablenessinsolublenessesinstructivenessinteruniversity

About this list

Words
16 (9 common words)
Common example
impecuniousness
Rare example
interuniversity
Doubled letters
9
Ending in S
11

Questions

How many 15-letter words matching i____u_________ are there?

16. 9 of them are common words.

What is a common example?

IMPECUNIOUSNESS is among the common words in this set.