15-Letter Words Matching __O____R_______

There are 20 15-letter words that match __O____R_______. 3 are common words, such as EGOCENTRICITIES and GROUNDBREAKINGS. A rarer one is PROTOPORPHYRINS. In this set, I is the most frequent open letter (18 words). 5 words contain a doubled letter.

Full list 20

egocentricitiesgroundbreakingsphosphorescencegoodheartednessodoriferousnessphosphorylationprointerventionzoogeographicalbiogeographicalcholinergicallyfloriferousnessphonocardiogramphosphorylatingphosphorylativephotoperiodismsproletarianisedproletarianisesproletarianizedproletarianizesprotoporphyrins

About this list

Words
20 (3 common words)
Common example
egocentricities
Rare example
protoporphyrins
Doubled letters
5
Ending in S
9
Most frequent letter
I (18)

Questions

How many 15-letter words matching __o____r_______ are there?

20. 3 of them are common words.

What is a common example?

EGOCENTRICITIES is among the common words in this set.