12-Letter Words Matching ________EI__

There are 17 12-letter words that match ________EI__. 7 are common words, such as COUNTERFEITS and FACSIMILEING. A rarer one is SYNCHRONEITY. In this set, N is the most frequent open letter (17 words). 3 words contain a doubled letter.

Full list 17

counterfeitsfacsimileingfricasseeinggarnisheeingguaranteeinghorseshoeingsimultaneitycounterweighfluoresceinsgegenscheinsincorporeitylipoproteinsvigilanteismfetoproteinshemoproteinsmucoproteinssynchroneity

About this list

Words
17 (7 common words)
Common example
counterfeits
Rare example
synchroneity
Doubled letters
3
Ending in S
7
Most frequent letter
N (17)

Questions

How many 12-letter words matching ________ei__ are there?

17. 7 of them are common words.

What is a common example?

COUNTERFEITS is among the common words in this set.