8-Letter Words Matching H_____M_

There are 20 8-letter words that match H_____M_. 10 are common words, such as HAFNIUMS and HAHNIUMS. A rarer one is HOLOGAMY. In this set, O is the most frequent open letter (15 words). 1 words contain a doubled letter.

Full list 20

hafniumshahniumshalftimehandsomeheadlampheroismsholmiumshomonymshoodlumshumdrumshecatombhematomahomogamyhomonymyhalidomehalidomsheirdomshepatomahoboismshologamy

About this list

Words
20 (10 common words)
Common example
hafniums
Rare example
hologamy
Doubled letters
1
Ending in S
10
Most frequent letter
O (15)

Questions

How many 8-letter words matching h_____m_ are there?

20. 10 of them are common words.

What is a common example?

HAFNIUMS is among the common words in this set.