15-Letter Words Matching ____U_I________

There are 21 15-letter words that match ____U_I________. 6 are common words, such as COMMUNICABILITY and EXCLUSIVENESSES. A rarer one is SECLUSIVENESSES. In this set, N is the most frequent open letter (20 words). 18 words contain a doubled letter.

Full list 21

communicabilityexclusivenesseshallucinogenicsinclusivenessesintrusivenessesobtrusivenessesbioluminescencecommunicationalcommunicativelycommunisticallyhallucinationalreclusivenessesvoyeuristicallyagglutinabilityconducivenessesdiffusivenessesmasculinizationmercurialnessesoverutilizationprejudicialnessseclusivenesses

About this list

Words
21 (6 common words)
Common example
communicability
Rare example
seclusivenesses
Doubled letters
18
Ending in S
11
Most frequent letter
N (20)

Questions

How many 15-letter words matching ____u_i________ are there?

21. 6 of them are common words.

What is a common example?

COMMUNICABILITY is among the common words in this set.