15-Letter Words Matching ______I__O_____

There are 44 15-letter words that match ______I__O_____. 8 are common words, such as BACTERIOLOGICAL and BACTERIOLOGISTS. A rarer one is UNTRADITIONALLY. In this set, O is the most frequent open letter (38 words). 8 words contain a doubled letter.

Full list 44

Common words

bacteriologicalbacteriologistsepidemiologistsmicrobiologicalmicrobiologistsprepositionallyprohibitionistsunconditionallyepidemiologicalphotomicrographphotomicroscoperadiomicrometer
bacteriologicalbacteriologistsepidemiologistsmicrobiologicalmicrobiologistsprepositionallyprohibitionistsunconditionallyepidemiologicalphotomicrographphotomicroscoperadiomicrometersociobiologicalsociobiologistsultramicrometerultramicroscopeamphidiploidiesastrobiologistscompositionallyecclesiologicalecclesiologistsethnohistoriansethnohistoricalhydrobiologicalhydrobiologistsliturgiologistsneurobiologicalneurobiologistsoveropinionatedpaleobiologicalpaleobiologistsphotobiologicalphotobiologistsphotodissociatephotolithographprerevisionistsprotohistoriansradiobiologicalradiobiologistssociohistoricaltranshistoricaltransmissometerultramicrotomesuntraditionally

About this list

Words
44 (8 common words)
Common example
bacteriological
Rare example
untraditionally
Doubled letters
8
Ending in S
18
Most frequent letter
O (38)

Questions

How many 15-letter words matching ______i__o_____ are there?

44. 8 of them are common words.

What is a common example?

BACTERIOLOGICAL is among the common words in this set.