15-Letter Words Matching H________R_____

There are 12 15-letter words that match H________R_____. 2 are common words, such as HARPSICHORDISTS and HISTORIOGRAPHER. A rarer one is HYPERPOLARIZING. In this set, I is the most frequent open letter (12 words). 1 words contain a doubled letter.

Full list 12

harpsichordistshistoriographerheliocentricityhexylresorcinolhistoriographichousemistresseshypochondriacalhypochondriaseshypochondriasisheadmastershipshypermodernistshyperpolarizing

About this list

Words
12 (2 common words)
Common example
harpsichordists
Rare example
hyperpolarizing
Doubled letters
1
Ending in S
6
Most frequent letter
I (12)

Questions

How many 15-letter words matching h________r_____ are there?

12. 2 of them are common words.

What is a common example?

HARPSICHORDISTS is among the common words in this set.