12-Letter Words Matching ____R_____M_

There are 26 12-letter words that match ____R_____M_. 8 are common words, such as AGRARIANISMS and DETERMINISMS. A rarer one is SUPERSYSTEMS. In this set, S is the most frequent open letter (24 words). 5 words contain a doubled letter.

Full list 26

Common words

agrarianismsdeterminismsimperialismsinterregnumsmaterialismsopportunismspaternalismsquadrenniumsantirrhinumschlorenchymaeuchromosomesclerenchyma
agrarianismsdeterminismsimperialismsinterregnumsmaterialismsopportunismspaternalismsquadrenniumsantirrhinumschlorenchymaeuchromosomesclerenchymasuperphylumsantirealismsarteriogramsaspergillumsexternalismsfluorochromeheteroecismslibertinismsmanorialismsmaternalismspelargoniumspolyribosomesuperorgasmssupersystems

About this list

Words
26 (8 common words)
Common example
agrarianisms
Rare example
supersystems
Doubled letters
5
Ending in S
21
Most frequent letter
S (24)

Questions

How many 12-letter words matching ____r_____m_ are there?

26. 8 of them are common words.

What is a common example?

AGRARIANISMS is among the common words in this set.