12-Letter Words Matching ____H__M____

There are 20 12-letter words that match ____H__M____. 4 are common words, such as BEACHCOMBERS and FORTHCOMINGS. A rarer one is PSYCHROMETRY. In this set, O is the most frequent open letter (19 words). 4 words contain a doubled letter.

Full list 20

beachcombersforthcomingspanchromaticphilharmonicapochromaticapothegmaticarithmomancybeachcombingerythromycingeothermallyisochromaticisothermallyophthalmitisprothrombinspsychrometertrichromatictrochelminthexothermallyjackhammeredpsychrometry

About this list

Words
20 (4 common words)
Common example
beachcombers
Rare example
psychrometry
Doubled letters
4
Ending in S
4
Most frequent letter
O (19)

Questions

How many 12-letter words matching ____h__m____ are there?

20. 4 of them are common words.

What is a common example?

BEACHCOMBERS is among the common words in this set.