15-Letter Words Matching H________N_____

There are 15 15-letter words that match H________N_____. 8 are common words, such as HAPHAZARDNESSES and HEALTHFULNESSES. A rarer one is HYPERSALINITIES. In this set, E is the most frequent open letter (15 words). 12 words contain a doubled letter.

Full list 15

haphazardnesseshealthfulnessesheartlessnessesheartsicknesseshilariousnesseshonorablenesseshotheadednesseshumorlessnesseshyperextensionshabitablenesseshazardousnesseshemoglobinuriashouselessnesseshyperimmunizinghypersalinities

About this list

Words
15 (8 common words)
Common example
haphazardnesses
Rare example
hypersalinities
Doubled letters
12
Ending in S
14
Most frequent letter
E (15)

Questions

How many 15-letter words matching h________n_____ are there?

15. 8 of them are common words.

What is a common example?

HAPHAZARDNESSES is among the common words in this set.