14-Letter Words Matching U_____I_______

There are 21 14-letter words that match U_____I_______. 2 are common words, such as UNCONVINCINGLY and UNMENTIONABLES. A rarer one is UREDINIOSPORES. In this set, R is the most frequent open letter (18 words). 7 words contain a doubled letter.

Full list 21

unconvincinglyunmentionablesunacclimatizedunattributableungraciousnessunmarriageableunmercifulnessunpropitiouslyunrefrigeratedunrequitednessuproariousnessultracivilizedultradistancesultrafiltratesultramicrotomeultramicrotomyultraminiatureultrarightistsultraviolencesunpredictablesurediniospores

About this list

Words
21 (2 common words)
Common example
unconvincingly
Rare example
urediniospores
Doubled letters
7
Ending in S
11
Most frequent letter
R (18)

Questions

How many 14-letter words matching u_____i_______ are there?

21. 2 of them are common words.

What is a common example?

UNCONVINCINGLY is among the common words in this set.