15-Letter Words Matching ______IO_______

There are 42 15-letter words that match ______IO_______. 12 are common words, such as BACTERIOLOGICAL and BACTERIOLOGISTS. A rarer one is TRADITIONALIZES. In this set, I is the most frequent open letter (41 words). 4 words contain a doubled letter.

Full list 42

Common words

bacteriologicalbacteriologistsepidemiologistshistoriographermicrobiologicalmicrobiologistssensationalismssensationalistssensationalizedsensationalizestraditionalismstraditionalists
bacteriologicalbacteriologistsepidemiologistshistoriographermicrobiologicalmicrobiologistssensationalismssensationalistssensationalizedsensationalizestraditionalismstraditionalistseducationalistsepidemiologicalhistoriographicsociobiologicalsociobiologistsastrobiologistsbacteriophagiesecclesiologicalecclesiologistsexceptionalismsexceptionalnessgnotobioticallyhydrobiologicalhydrobiologistsliturgiologistsneurobiologicalneurobiologistsoperationalismsoperationalistspaleobiologicalpaleobiologistsphotobiologicalphotobiologistsradiobiologicalradiobiologistssensationalisedsensationalisesstoichiometriestraditionalizedtraditionalizes

About this list

Words
42 (12 common words)
Common example
bacteriological
Rare example
traditionalizes
Doubled letters
4
Ending in S
26
Most frequent letter
I (41)

Questions

How many 15-letter words matching ______io_______ are there?

42. 12 of them are common words.

What is a common example?

BACTERIOLOGICAL is among the common words in this set.