12-Letter Words Matching ______IR____

There are 21 12-letter words that match ______IR____. 5 are common words, such as DEBONAIRNESS and MICROCIRCUIT. A rarer one is POLIOVIRUSES. In this set, E is the most frequent open letter (18 words). 4 words contain a doubled letter.

Full list 21

debonairnessmicrocircuitreconfirmingretrovirusestriumviratesadenovirusesirrespirablerhinovirusesundergirdingunrepairableblackbirdersblackbirdingdecemviratesdisaffirminglentivirusesnonempiricaloverstirringparvovirusespleinairismspleinairistspolioviruses

About this list

Words
21 (5 common words)
Common example
debonairness
Rare example
polioviruses
Doubled letters
4
Ending in S
12
Most frequent letter
E (18)

Questions

How many 12-letter words matching ______ir____ are there?

21. 5 of them are common words.

What is a common example?

DEBONAIRNESS is among the common words in this set.