15-Letter Words Matching _____O___U_____

There are 14 15-letter words that match _____O___U_____. 4 are common words, such as ACRIMONIOUSNESS and CEREMONIOUSNESS. A rarer one is UNMELODIOUSNESS. In this set, E is the most frequent open letter (12 words). 5 words contain a doubled letter.

Full list 14

acrimoniousnessceremoniousnessheterosexualitymeritoriousnesspleuropneumoniaimmunomodulatormonomolecularlypsychoacousticspsychosexualitytechnostructurethermoregulatedthermoregulatesthermoregulatorunmelodiousness

About this list

Words
14 (4 common words)
Common example
acrimoniousness
Rare example
unmelodiousness
Doubled letters
5
Ending in S
6
Most frequent letter
E (12)

Questions

How many 15-letter words matching _____o___u_____ are there?

14. 4 of them are common words.

What is a common example?

ACRIMONIOUSNESS is among the common words in this set.