15-Letter Words Matching ____O___H______

There are 17 15-letter words that match ____O___H______. 3 are common words, such as HYDROCEPHALUSES and PHILOSOPHICALLY. A rarer one is TRISOCTAHEDRONS. In this set, I is the most frequent open letter (16 words). 6 words contain a doubled letter.

Full list 17

hydrocephalusesphilosophicallyservomechanismshomeopathicallyosteopathicallyphotomechanicalservomechanicalanacoluthicallyhistopathologichydromechanicalmicrotechniquesneuropathicallyneuropathologicphotolithographphytopathogenictomboyishnessestrisoctahedrons

About this list

Words
17 (3 common words)
Common example
hydrocephaluses
Rare example
trisoctahedrons
Doubled letters
6
Ending in S
5
Most frequent letter
I (16)

Questions

How many 15-letter words matching ____o___h______ are there?

17. 3 of them are common words.

What is a common example?

HYDROCEPHALUSES is among the common words in this set.