12-Letter Words Matching S_________H_

There are 16 12-letter words that match S_________H_. 5 are common words, such as SEISMOGRAPHS and SEISMOGRAPHY. A rarer one is SYMPOSIARCHS. In this set, R is the most frequent open letter (14 words). 2 words contain a doubled letter.

Full list 16

seismographsseismographyselenographyseventeenthssilversmithsshadowgraphsstereographystratigraphysaddleclothsscintigraphyshadowgraphysprachgefuhlstereographssupergrowthssupersleuthssymposiarchs

About this list

Words
16 (5 common words)
Common example
seismographs
Rare example
symposiarchs
Doubled letters
2
Ending in S
9
Most frequent letter
R (14)

Questions

How many 12-letter words matching s_________h_ are there?

16. 5 of them are common words.

What is a common example?

SEISMOGRAPHS is among the common words in this set.