15-Letter Words Matching ___O_____O_____

There are 13 15-letter words that match ___O_____O_____. 1 are common words, such as UNCONDITIONALLY and ASSOCIATIONISMS. A rarer one is RIBONUCLEOTIDES. In this set, I is the most frequent open letter (13 words). 4 words contain a doubled letter.

Full list 13

unconditionallyassociationismsassociationistscytomegalovirusechocardiogramsendometriosisesendonucleolyticholometabolismsinformationallymononucleosisesmononucleotidesribonucleosidesribonucleotides

About this list

Words
13 (1 common words)
Common example
unconditionally
Rare example
ribonucleotides
Doubled letters
4
Ending in S
10
Most frequent letter
I (13)

Questions

How many 15-letter words matching ___o_____o_____ are there?

13. 1 of them are common words.

What is a common example?

UNCONDITIONALLY is among the common words in this set.