14-Letter Words Matching ____O_______M_

There are 13 14-letter words that match ____O_______M_. 3 are common words, such as COLLOQUIALISMS and ETHNOCENTRISMS. A rarer one is PHOTOCHROMISMS. In this set, I is the most frequent open letter (13 words). 2 words contain a doubled letter.

Full list 13

colloquialismsethnocentrismsmicroorganismsadenocarcinomaclitoridectomyhomeomorphismsprotoactiniumscorporativismscosmopolitismsnonconformismspaedomorphismsphenomenalismsphotochromisms

About this list

Words
13 (3 common words)
Common example
colloquialisms
Rare example
photochromisms
Doubled letters
2
Ending in S
11
Most frequent letter
I (13)

Questions

How many 14-letter words matching ____o_______m_ are there?

13. 3 of them are common words.

What is a common example?

COLLOQUIALISMS is among the common words in this set.