13-Letter Words Matching ________O___M

There are 29 13-letter words that match ________O___M. 6 are common words, such as EXHIBITIONISM and EXPRESSIONISM. A rarer one is THERMOTROPISM. In this set, I is the most frequent open letter (24 words). 9 words contain a doubled letter.

Full list 29

Common words

exhibitionismexpressionismimpressionismparallelogramperfectionismprotectionismannexationismanticlinoriumantiterrorismapogeotropismdiageotropismencephalogram
exhibitionismexpressionismimpressionismparallelogramperfectionismprotectionismannexationismanticlinoriumantiterrorismapogeotropismdiageotropismencephalogramferrochromiumrevolutionismroentgenogramstereotropismsuccinctoriumthigmotropismaldosteronismautoradiogramcholangiogramdecamethoniumfeuilletonismhexamethoniuminterferogramodontoglossumphotochromismplethysmogramthermotropism

About this list

Words
29 (6 common words)
Common example
exhibitionism
Rare example
thermotropism
Doubled letters
9
Ending in S
0
Most frequent letter
I (24)

Questions

How many 13-letter words matching ________o___m are there?

29. 6 of them are common words.

What is a common example?

EXHIBITIONISM is among the common words in this set.