13-Letter Words Matching __IO_________

There are 13 13-letter words that match __IO_________. 5 are common words, such as AXIOMATICALLY and CLIOMETRICIAN. A rarer one is UNIONISATIONS. In this set, A is the most frequent open letter (13 words). 6 words contain a doubled letter.

Full list 13

axiomaticallycliometricianidiomaticallyidiosyncraticunionizationsetiologicallyabiogenicallyaxiologicallydeionizationsglioblastomasidiomaticnessthioridazinesunionisations

About this list

Words
13 (5 common words)
Common example
axiomatically
Rare example
unionisations
Doubled letters
6
Ending in S
6
Most frequent letter
A (13)

Questions

How many 13-letter words matching __io_________ are there?

13. 5 of them are common words.

What is a common example?

AXIOMATICALLY is among the common words in this set.