15-Letter Words Matching O________L_____

There are 16 15-letter words that match O________L_____. 3 are common words, such as OPHTHALMOLOGIES and OPHTHALMOLOGIST. A rarer one is OVERSTABILITIES. In this set, I is the most frequent open letter (16 words). 3 words contain a doubled letter.

Full list 16

ophthalmologiesophthalmologistoverstimulatingoverstimulationobservabilitiesobtainabilitiesoccidentalizingorthogonalitiesorthogonalizingoutmanipulatingoverembellishedoverembellishesoverfertilizingoverspeculatingoverspeculationoverstabilities

About this list

Words
16 (3 common words)
Common example
ophthalmologies
Rare example
overstabilities
Doubled letters
3
Ending in S
6
Most frequent letter
I (16)

Questions

How many 15-letter words matching o________l_____ are there?

16. 3 of them are common words.

What is a common example?

OPHTHALMOLOGIES is among the common words in this set.