15-Letter Words Matching ____E____I_____

There are 32 15-letter words that match ____E____I_____. 10 are common words, such as CONSERVATIONISM and CONSERVATIONIST. A rarer one is SUBREPTITIOUSLY. In this set, T is the most frequent open letter (29 words). 15 words contain a doubled letter.

Full list 32

Common words

conservationismconservationistdifferentiatingdifferentiationeuphemisticallynondepreciatingnonrecognitionspreservationistsurreptitiouslyunpretentiouslycholecalciferolcholecystitides
conservationismconservationistdifferentiatingdifferentiationeuphemisticallynondepreciatingnonrecognitionspreservationistsurreptitiouslyunpretentiouslycholecalciferolcholecystitidesdifferentiatorshermeneuticallypresentationismpreservationismstereotypicallyvespertilioninearcheologicallybiomechanicallycholecystitisesconcertmeistersexcrementitiousgeotectonicallymartensiticallynoncertificatednonrecombinantsproteolyticallyseptendecillionstereologicallystereotaxicallysubreptitiously

About this list

Words
32 (10 common words)
Common example
conservationism
Rare example
subreptitiously
Doubled letters
15
Ending in S
7
Most frequent letter
T (29)

Questions

How many 15-letter words matching ____e____i_____ are there?

32. 10 of them are common words.

What is a common example?

CONSERVATIONISM is among the common words in this set.