12-Letter Words Matching ______I_O___

There are 16 12-letter words that match ______I_O___. 4 are common words, such as AVITAMINOSES and AVITAMINOSIS. A rarer one is LAMELLICORNS. In this set, N is the most frequent open letter (13 words). 6 words contain a doubled letter.

Full list 16

avitaminosesavitaminosishallucinogeninsectivoresagglutinogendeoxyriboseshallucinosissensorimotorstereoisomeravitaminoticcannabinoidscatholicosescocarcinogenhallucinosesintermitoticlamellicorns

About this list

Words
16 (4 common words)
Common example
avitaminoses
Rare example
lamellicorns
Doubled letters
6
Ending in S
9
Most frequent letter
N (13)

Questions

How many 12-letter words matching ______i_o___ are there?

16. 4 of them are common words.

What is a common example?

AVITAMINOSES is among the common words in this set.