15-Letter Words Matching _________I__O__

There are 15 15-letter words that match _________I__O__. 3 are common words, such as NONRECOGNITIONS and PREDISPOSITIONS. A rarer one is UNDERNUTRITIONS. In this set, S is the most frequent open letter (15 words). 2 words contain a doubled letter.

Full list 15

nonrecognitionspredispositionspresuppositionsdifferentiatorsneurophysiologycontrapositionsexcrementitioushistophysiologyhyperfastidiouspathophysiologysupernutritionsultrafastidiousultraprecisionsuncircumcisionsundernutritions

About this list

Words
15 (3 common words)
Common example
nonrecognitions
Rare example
undernutritions
Doubled letters
2
Ending in S
12
Most frequent letter
S (15)

Questions

How many 15-letter words matching _________i__o__ are there?

15. 3 of them are common words.

What is a common example?

NONRECOGNITIONS is among the common words in this set.