14-Letter Words Matching ________I____M

There are 20 14-letter words that match ________I____M. 7 are common words, such as ANTIQUARIANISM and DISEQUILIBRIUM. A rarer one is RESTRICTIONISM. In this set, I is the most frequent open letter (18 words). 3 words contain a doubled letter.

Full list 20

antiquarianismdisequilibriumegalitarianismexistentialismneocolonialismobstructionismutilitarianismabstractionismassociationismlibertarianismmillenarianismproletarianismsubstantialismterritorialismechocardiogramlymphangiogrammultiracialismnonequilibriumphotoperiodismrestrictionism

About this list

Words
20 (7 common words)
Common example
antiquarianism
Rare example
restrictionism
Doubled letters
3
Ending in S
0
Most frequent letter
I (18)

Questions

How many 14-letter words matching ________i____m are there?

20. 7 of them are common words.

What is a common example?

ANTIQUARIANISM is among the common words in this set.