15-Letter Words Matching ___U__________Y

There are 15 15-letter words that match ___U__________Y. 5 are common words, such as ARGUMENTATIVELY and INSUBSTANTIALLY. A rarer one is UNSUBSTANTIALLY. In this set, I is the most frequent open letter (14 words). 9 words contain a doubled letter.

Full list 15

argumentativelyinsubstantiallyinvulnerabilityritualisticallyunquestioninglyimmunochemistryimmunologicallyinquisitoriallyinsubordinatelyinsurrectionarymutualisticallyimmunopathologypseudopregnancyreduplicativelyunsubstantially

About this list

Words
15 (5 common words)
Common example
argumentatively
Rare example
unsubstantially
Doubled letters
9
Ending in S
0
Most frequent letter
I (14)

Questions

How many 15-letter words matching ___u__________y are there?

15. 5 of them are common words.

What is a common example?

ARGUMENTATIVELY is among the common words in this set.