11-Letter Words Matching _____N____M

There are 17 11-letter words that match _____N____M. 5 are common words, such as ECUMENICISM and NATIONALISM. A rarer one is STAMINODIUM. In this set, I is the most frequent open letter (16 words). 1 words contain a doubled letter.

Full list 17

ecumenicismnationalismpaternalismrationalismregionalismclinandriumcommunalismdiatonicismegocentrismexternalismfalconiformgeocentrismmaternalismpersonalismsardonicismretransformstaminodium

About this list

Words
17 (5 common words)
Common example
ecumenicism
Rare example
staminodium
Doubled letters
1
Ending in S
0
Most frequent letter
I (16)

Questions

How many 11-letter words matching _____n____m are there?

17. 5 of them are common words.

What is a common example?

ECUMENICISM is among the common words in this set.