11-Letter Words Matching ___O______M

There are 21 11-letter words that match ___O______M. 4 are common words, such as AGNOSTICISM and BLOODSTREAM. A rarer one is XEROPHYTISM. In this set, I is the most frequent open letter (18 words). 4 words contain a doubled letter.

Full list 21

agnosticismbloodstreamcolonialismopportunismautoerotismcologarithmendocardiumendocraniumendometriumendotheciumendotheliummanorialismmesotheliummesothoriummonochasiumpleochroismrheotropismbryophyllumhomoiothermpodophyllumxerophytism

About this list

Words
21 (4 common words)
Common example
agnosticism
Rare example
xerophytism
Doubled letters
4
Ending in S
0
Most frequent letter
I (18)

Questions

How many 11-letter words matching ___o______m are there?

21. 4 of them are common words.

What is a common example?

AGNOSTICISM is among the common words in this set.