15-Letter Words Matching E_I____________

There are 15 15-letter words that match E_I____________. 3 are common words, such as EPIDEMIOLOGISTS and EXISTENTIALISMS. A rarer one is EPIZOOTIOLOGIES. In this set, I is the most frequent open letter (14 words). 4 words contain a doubled letter.

Full list 15

epidemiologistsexistentialismsexistentialistsepidemiologicalepiscopalianismepistemologicalepistemologistsepichlorohydrinepigrammatizersepigrammatizingepiphenomenallyepithelializingepitheliomatousepithelizationsepizootiologies

About this list

Words
15 (3 common words)
Common example
epidemiologists
Rare example
epizootiologies
Doubled letters
4
Ending in S
8
Most frequent letter
I (14)

Questions

How many 15-letter words matching e_i____________ are there?

15. 3 of them are common words.

What is a common example?

EPIDEMIOLOGISTS is among the common words in this set.