15-Letter Words Matching E_______O______

There are 17 15-letter words that match E_______O______. 4 are common words, such as ENDOCRINOLOGIES and ENDOCRINOLOGIST. A rarer one is ERYTHROPOIETINS. In this set, I is the most frequent open letter (15 words). 4 words contain a doubled letter.

Full list 17

endocrinologiesendocrinologistexpeditiousnessexpressionisticefficaciousnesselectropositiveencephalographyexhibitionisticecophysiologiesenantiomorphismenantiomorphousencephalographsencephalopathicepichlorohydrinepitheliomatousepizootiologieserythropoietins

About this list

Words
17 (4 common words)
Common example
endocrinologies
Rare example
erythropoietins
Doubled letters
4
Ending in S
9
Most frequent letter
I (15)

Questions

How many 15-letter words matching e_______o______ are there?

17. 4 of them are common words.

What is a common example?

ENDOCRINOLOGIES is among the common words in this set.