15-Letter Words Matching ___I______R____

There are 16 15-letter words that match ___I______R____. 6 are common words, such as ANTIPERSPIRANTS and BUSINESSPERSONS. A rarer one is SOLITUDINARIANS. In this set, A is the most frequent open letter (14 words). 2 words contain a doubled letter.

Full list 16

antiperspirantsbusinesspersonslatitudinariansnoninterferenceradiotelegraphsradiotelegraphyantimilitarismsantimilitaristsantipornographyradioautographsradioautographysemicylindricalsemipornographysocioculturallysociohistoricalsolitudinarians

About this list

Words
16 (6 common words)
Common example
antiperspirants
Rare example
solitudinarians
Doubled letters
2
Ending in S
8
Most frequent letter
A (14)

Questions

How many 15-letter words matching ___i______r____ are there?

16. 6 of them are common words.

What is a common example?

ANTIPERSPIRANTS is among the common words in this set.