15-Letter Words Matching __________R_I__

There are 12 15-letter words that match __________R_I__. 1 are common words, such as UNCONTROVERSIAL and CORTICOSTEROIDS. A rarer one is ULTRACOMMERCIAL. 1 words contain a doubled letter.

Full list 12

uncontroversialcorticosteroidselectrothermicsinterconversionweatherboardingcountercharginginterconvertinginterfraternityinteruniversitymicrometeoroidsparthenocarpiesultracommercial

About this list

Words
12 (1 common words)
Common example
uncontroversial
Rare example
ultracommercial
Doubled letters
1
Ending in S
4

Questions

How many 15-letter words matching __________r_i__ are there?

12. 1 of them are common words.

What is a common example?

UNCONTROVERSIAL is among the common words in this set.