15-Letter Words Matching ____I_____R____

There are 15 15-letter words that match ____I_____R____. 4 are common words, such as ARCHITECTURALLY and DISCIPLINARIANS. A rarer one is SILVICULTURISTS. 4 words contain a doubled letter.

Full list 15

architecturallydisciplinarianshorticulturistsstraightforwardcorticosteroidscorticosteroneshorticulturallyamphitheatricalcholinesterasescitriculturistsfloriculturistspectinesterasespremillenarianssilviculturallysilviculturists

About this list

Words
15 (4 common words)
Common example
architecturally
Rare example
silviculturists
Doubled letters
4
Ending in S
10

Questions

How many 15-letter words matching ____i_____r____ are there?

15. 4 of them are common words.

What is a common example?

ARCHITECTURALLY is among the common words in this set.