13-Letter Words Matching S________P___

There are 18 13-letter words that match S________P___. 5 are common words, such as SEISMOGRAPHER and SEISMOGRAPHIC. A rarer one is SUPERENCIPHER. In this set, R is the most frequent open letter (18 words). 3 words contain a doubled letter.

Full list 18

seismographerseismographicselenographersharecropperssharecroppingstereographicstereoscopiesstereotropismstormtroopersstratigrapherstratigraphicscintigraphicsesquiterpenesomatotrophinsomatotropinsstereographedsubprincipalssuperencipher

About this list

Words
18 (5 common words)
Common example
seismographer
Rare example
superencipher
Doubled letters
3
Ending in S
5
Most frequent letter
R (18)

Questions

How many 13-letter words matching s________p___ are there?

18. 5 of them are common words.

What is a common example?

SEISMOGRAPHER is among the common words in this set.