According to SOWPODS (the combination of Scrabble dictionaries
used around the world) there are 10 words with the pattern
I-E--I--S. That is, nine letter words with 1st letter I and 3rd
letter E and 6th letter I and 9th letter S. In alphabetical order,
they are:
iceblinks
idealises
idealisms
idealists
idealizes
ideations
ileitides
ileitises
inebrious
inessives