12-Letter Words Matching ________E_N_

There are 21 12-letter words that match ________E_N_. 10 are common words, such as EQUESTRIENNE and FACSIMILEING. A rarer one is SUPERALTERNS. In this set, S is the most frequent open letter (20 words). 7 words contain a doubled letter.

Full list 21

equestriennefacsimileingfricasseeinggarnisheeingguaranteeinghorseshoeingnickelodeonssmokescreenstouchscreenswintergreensfluoresceinsgegenscheinslipoproteinsantinucleonscryosurgeonsfetoproteinshemoproteinshyperboreansmucoproteinsoverconcernssuperalterns

About this list

Words
21 (10 common words)
Common example
equestrienne
Rare example
superalterns
Doubled letters
7
Ending in S
15
Most frequent letter
S (20)

Questions

How many 12-letter words matching ________e_n_ are there?

21. 10 of them are common words.

What is a common example?

EQUESTRIENNE is among the common words in this set.