14-Letter Words Matching I____U________

There are 13 14-letter words that match I____U________. 6 are common words, such as IMMACULATENESS and IMPLAUSIBILITY. A rarer one is INSTRUCTRESSES. In this set, S is the most frequent open letter (11 words). 8 words contain a doubled letter.

Full list 13

immaculatenessimplausibilityinscrutabilityinsolubilitiesinstrumentallyirregularitiesinstructorshipinvaluablenessirreducibilityirrefutabilityinsecurenessesinsolubilizinginstructresses

About this list

Words
13 (6 common words)
Common example
immaculateness
Rare example
instructresses
Doubled letters
8
Ending in S
6
Most frequent letter
S (11)

Questions

How many 14-letter words matching i____u________ are there?

13. 6 of them are common words.

What is a common example?

IMMACULATENESS is among the common words in this set.