15-Letter Words Matching _______R_____M_

There are 12 15-letter words that match _______R_____M_. 4 are common words, such as ANTIQUARIANISMS and EGALITARIANISMS. A rarer one is TERRITORIALISMS. 3 words contain a doubled letter.

Full list 12

antiquarianismsegalitarianismshypothyroidismsutilitarianismslibertarianismsmillenarianismsindifferentismslymphogranulomaparajournalismsphotoperiodismsradiostrontiumsterritorialisms

About this list

Words
12 (4 common words)
Common example
antiquarianisms
Rare example
territorialisms
Doubled letters
3
Ending in S
11

Questions

How many 15-letter words matching _______r_____m_ are there?

12. 4 of them are common words.

What is a common example?

ANTIQUARIANISMS is among the common words in this set.