14-Letter Words Matching O___________I_

There are 13 14-letter words that match O___________I_. 2 are common words, such as OSTEOARTHRITIS and OVEROPTIMISTIC. A rarer one is OVERSIMPLISTIC. 2 words contain a doubled letter.

Full list 13

osteoarthritisoveroptimisticophthalmologicoptoelectronicorganometallicorthochromaticosteoarthriticoveridealisticoligopsonisticomphaloskepsisonchocerciasisoscillographicoversimplistic

About this list

Words
13 (2 common words)
Common example
osteoarthritis
Rare example
oversimplistic
Doubled letters
2
Ending in S
3

Questions

How many 14-letter words matching o___________i_ are there?

13. 2 of them are common words.

What is a common example?

OSTEOARTHRITIS is among the common words in this set.