15-Letter Words Matching _I___________R_

There are 12 15-letter words that match _I___________R_. 2 are common words, such as KINDERGARTENERS and MICROPROCESSORS. A rarer one is MICROPUBLISHERS. In this set, O is the most frequent open letter (11 words). 5 words contain a doubled letter.

Full list 12

kindergartenersmicroprocessorsbiogeochemistrydifferentiatorsdissatisfactoryfideicommissarynitrochloroformdiffractometersdisinflationarymicrophotometrymicroprojectorsmicropublishers

About this list

Words
12 (2 common words)
Common example
kindergarteners
Rare example
micropublishers
Doubled letters
5
Ending in S
6
Most frequent letter
O (11)

Questions

How many 15-letter words matching _i___________r_ are there?

12. 2 of them are common words.

What is a common example?

KINDERGARTENERS is among the common words in this set.