14-Letter Words Matching __I___O_______

There are 20 14-letter words that match __I___O_______. 8 are common words, such as CLIMATOLOGISTS and CRIMINOLOGISTS. A rarer one is TRIHALOMETHANE. In this set, I is the most frequent open letter (18 words). 4 words contain a doubled letter.

Full list 20

climatologistscriminologistsneighborlinessphilosophizersphilosophizingreintroductiontrigonometriesvaingloriouslyclimatologicalcriminologicalphilologicallypoikilothermictriiodomethanefrictionlesslyopisthobranchsphilosophisingprimatologicalprimatologiststrichromatismstrihalomethane

About this list

Words
20 (8 common words)
Common example
climatologists
Rare example
trihalomethane
Doubled letters
4
Ending in S
8
Most frequent letter
I (18)

Questions

How many 14-letter words matching __i___o_______ are there?

20. 8 of them are common words.

What is a common example?

CLIMATOLOGISTS is among the common words in this set.