15-Letter Words Matching ___IR__________

There are 13 15-letter words that match ___IR__________. 4 are common words, such as BIDIRECTIONALLY and DELIRIOUSNESSES. A rarer one is UNCIRCUMCISIONS. In this set, N is the most frequent open letter (13 words). 6 words contain a doubled letter.

Full list 13

bidirectionallydeliriousnessesdesirablenessesenvironmentallyadmirablenessesantiradicalismsantirationalismantirationalistantirationalityantiromanticismepeirogenicallysemiretirementsuncircumcisions

About this list

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

Questions

How many 15-letter words matching ___ir__________ are there?

13. 4 of them are common words.

What is a common example?

BIDIRECTIONALLY is among the common words in this set.