9-Letter Words Matching ____HN___

There are 15 9-letter words that match ____HN___. 10 are common words, such as ARACHNIDS and BEECHNUTS. A rarer one is LOATHNESS. In this set, S is the most frequent open letter (13 words). 10 words contain a doubled letter.

Full list 15

arachnidsbeechnutsbrashnessdoughnutsfreshnessharshnessplushnessroughneckroughnesstoughnessarachnoidearthnutsflushnessapishnessloathness

About this list

Words
15 (10 common words)
Common example
arachnids
Rare example
loathness
Doubled letters
10
Ending in S
13
Most frequent letter
S (13)

Questions

How many 9-letter words matching ____hn___ are there?

15. 10 of them are common words.

What is a common example?

ARACHNIDS is among the common words in this set.