9-Letter Words Matching ___O___H_

There are 18 9-letter words that match ___O___H_. 4 are common words, such as ALGORITHM and CENOTAPHS. A rarer one is XENOLITHS. In this set, T is the most frequent open letter (14 words). 2 words contain a doubled letter.

Full list 18

algorithmcenotaphsmonolithstheosophyallopathycoronachsidiopathylogomachysciomachytheomachytokolosheacrolithsaerolithsallopathskryolithslogomachsregolithsxenoliths

About this list

Words
18 (4 common words)
Common example
algorithm
Rare example
xenoliths
Doubled letters
2
Ending in S
10
Most frequent letter
T (14)

Questions

How many 9-letter words matching ___o___h_ are there?

18. 4 of them are common words.

What is a common example?

ALGORITHM is among the common words in this set.