14-Letter Words Matching ___O______O___

There are 17 14-letter words that match ___O______O___. 5 are common words, such as DECOMMISSIONED and DENOMINATIONAL. A rarer one is THROMBOEMBOLIC. In this set, I is the most frequent open letter (16 words). 4 words contain a doubled letter.

Full list 17

decommissioneddenominationalnonoperationalrecommissionedunconventionalendocrinologicmucoviscidosisoptoelectronicallopolyploidsallopolyploidyautopolyploidsautopolyploidychromatophoreschronobiologicendopolyploidypreoperationalthromboembolic

About this list

Words
17 (5 common words)
Common example
decommissioned
Rare example
thromboembolic
Doubled letters
4
Ending in S
4
Most frequent letter
I (16)

Questions

How many 14-letter words matching ___o______o___ are there?

17. 5 of them are common words.

What is a common example?

DECOMMISSIONED is among the common words in this set.