15-Letter Words Matching __R_____O______

There are 18 15-letter words that match __R_____O______. 6 are common words, such as ACRIMONIOUSNESS and CARNIVOROUSNESS. A rarer one is XERORADIOGRAPHY. In this set, I is the most frequent open letter (18 words). 9 words contain a doubled letter.

Full list 18

acrimoniousnesscarnivorousnessceremoniousnessharpsichordistsmeritoriousnessunrighteousnesshermaphroditismirreligiousnessmorphophonemicsperfectionisticperfunctorinessperspicuousnessatrabiliousnesschronobiologieschronobiologiststrongyloidosesstrongyloidosisxeroradiography

About this list

Words
18 (6 common words)
Common example
acrimoniousness
Rare example
xeroradiography
Doubled letters
9
Ending in S
14
Most frequent letter
I (18)

Questions

How many 15-letter words matching __r_____o______ are there?

18. 6 of them are common words.

What is a common example?

ACRIMONIOUSNESS is among the common words in this set.