12-Letter Words Matching ________I_R_

There are 18 12-letter words that match ________I_R_. 6 are common words, such as ELECTRIFIERS and INTENSIFIERS. A rarer one is SUPERCILIARY. In this set, E is the most frequent open letter (18 words). 4 words contain a doubled letter.

Full list 18

electrifiersintensifiersintermediarymisbehaviorspenitentiaryphotocopierslammergeiersresidentiaryballcarriersbullterrierschansonnierschocolatiersdenitrifiersdiversifiersfourdriniersindemnifierspersonifierssuperciliary

About this list

Words
18 (6 common words)
Common example
electrifiers
Rare example
superciliary
Doubled letters
4
Ending in S
14
Most frequent letter
E (18)

Questions

How many 12-letter words matching ________i_r_ are there?

18. 6 of them are common words.

What is a common example?

ELECTRIFIERS is among the common words in this set.