15-Letter Words Matching ___U_I_________

There are 20 15-letter words that match ___U_I_________. 4 are common words, such as BEAUTIFICATIONS and INJUDICIOUSNESS. A rarer one is UNDUTIFULNESSES. 11 words contain a doubled letter.

Full list 20

beautificationsinjudiciousnessluxuriousnessespenuriousnessesinjuriousnessesplausiblenessesbeautifulnessesbituminizationsincuriousnessesindubitablenessinfusiblenessesmisutilizationsnonuniformitiesnonuniquenessesnonuniversitiesnonutilitariansrepudiationistssecuritizationssolubilizationsundutifulnesses

About this list

Words
20 (4 common words)
Common example
beautifications
Rare example
undutifulnesses
Doubled letters
11
Ending in S
20

Questions

How many 15-letter words matching ___u_i_________ are there?

20. 4 of them are common words.

What is a common example?

BEAUTIFICATIONS is among the common words in this set.