15-Letter Words Matching U_I____________

There are 13 15-letter words that match U_I____________. 3 are common words, such as UNIMAGINATIVELY and UNINTENTIONALLY. A rarer one is UNIVERSALNESSES. In this set, N is the most frequent open letter (13 words). 6 words contain a doubled letter.

Full list 13

unimaginativelyunintentionallyutilitarianismsunimplementableubiquitarianismuninformativelyunintelligentlyuninterpretableuninterruptedlyuninterruptibleuniformitariansuninhibitednessuniversalnesses

About this list

Words
13 (3 common words)
Common example
unimaginatively
Rare example
universalnesses
Doubled letters
6
Ending in S
4
Most frequent letter
N (13)

Questions

How many 15-letter words matching u_i____________ are there?

13. 3 of them are common words.

What is a common example?

UNIMAGINATIVELY is among the common words in this set.