15-Letter Words Matching ____E________I_

There are 12 15-letter words that match ____E________I_. 2 are common words, such as EXPRESSIONISTIC and IMPRESSIONISTIC. A rarer one is NUCLEOSYNTHETIC. In this set, C is the most frequent open letter (12 words). 4 words contain a doubled letter.

Full list 12

expressionisticimpressionisticcommercialisticconservatorshipperfectionisticcholecystokininconceptualistichendecasyllabicmagnetoelectricnonrelativisticnucleosynthesisnucleosynthetic

About this list

Words
12 (2 common words)
Common example
expressionistic
Rare example
nucleosynthetic
Doubled letters
4
Ending in S
1
Most frequent letter
C (12)

Questions

How many 15-letter words matching ____e________i_ are there?

12. 2 of them are common words.

What is a common example?

EXPRESSIONISTIC is among the common words in this set.