11-Letter Words Matching _______H_S_

There are 16 11-letter words that match _______H_S_. 4 are common words, such as ARCHDUCHESS and ENFRANCHISE. A rarer one is RESEARCHIST. In this set, I is the most frequent open letter (13 words). 4 words contain a doubled letter.

Full list 16

archduchessenfranchisetheosophistthoroughestaffranchiseallopathistanamorphismisomorphismpanpsychistprognathismtelepathisttrimorphismzoomorphismepigraphistprepurchaseresearchist

About this list

Words
16 (4 common words)
Common example
archduchess
Rare example
researchist
Doubled letters
4
Ending in S
1
Most frequent letter
I (13)

Questions

How many 11-letter words matching _______h_s_ are there?

16. 4 of them are common words.

What is a common example?

ARCHDUCHESS is among the common words in this set.