15-Letter Words Matching _____O___P_____

There are 13 15-letter words that match _____O___P_____. 2 are common words, such as BIBLIOGRAPHICAL and LEXICOGRAPHICAL. A rarer one is PSEUDOMORPHISMS. In this set, I is the most frequent open letter (13 words). 4 words contain a doubled letter.

Full list 13

bibliographicallexicographicaloceanographicalphysiographicalzoogeographicalallelomorphismsanticorruptionsbiogeographicalhematoporphyrinheteromorphismsimmunocompetentnonbiographicalpseudomorphisms

About this list

Words
13 (2 common words)
Common example
bibliographical
Rare example
pseudomorphisms
Doubled letters
4
Ending in S
4
Most frequent letter
I (13)

Questions

How many 15-letter words matching _____o___p_____ are there?

13. 2 of them are common words.

What is a common example?

BIBLIOGRAPHICAL is among the common words in this set.