12-Letter Words Matching __I____O____

There are 41 12-letter words that match __I____O____. 12 are common words, such as BOISTEROUSLY and CHILDPROOFED. A rarer one is TRIPHTHONGAL. In this set, E is the most frequent open letter (30 words). 3 words contain a doubled letter.

Full list 41

Common words

boisterouslychildproofedchivalrouslycrisscrossedcrisscrossesepidemiologyiniquitouslyreinvigorateseismologiesseismologistswitchboardsubiquitously
boisterouslychildproofedchivalrouslycrisscrossedcrisscrossesepidemiologyiniquitouslyreinvigorateseismologiesseismologistswitchboardsubiquitouslyepistemologyaniseikoniasanisotropiesblithesomelyepiphenomenaepisiotomiestrichomonadsunifoliolateanisotropismepicycloidalepiphytologyepiphytoticsoligopsoniesoligotrophicorismologiesprivatdocentprivatdozentrhinoscopiesrhizoctoniasroisterouslythixotropiestrichologiestrichologisttrichotomiestrichotomoustrifoliolatetrimethoprimtrimetrogonstriphthongal

About this list

Words
41 (12 common words)
Common example
boisterously
Rare example
triphthongal
Doubled letters
3
Ending in S
17
Most frequent letter
E (30)

Questions

How many 12-letter words matching __i____o____ are there?

41. 12 of them are common words.

What is a common example?

BOISTEROUSLY is among the common words in this set.