12-Letter Words Matching __O___P_____

There are 20 12-letter words that match __O___P_____. 7 are common words, such as APOCRYPHALLY and BIOGRAPHICAL. A rarer one is TROCHOPHORES. In this set, R is the most frequent open letter (18 words). 3 words contain a doubled letter.

Full list 20

apocryphallybiographicalgeographicalreoccupationspokespeoplespokespersontropospheresapomorphineschordophonesisomorphismsisopropanolsorographicalphotosphericsportspeoplesportspersontroposphericgoogolplexesozonospheresphotospherestrochophores

About this list

Words
20 (7 common words)
Common example
apocryphally
Rare example
trochophores
Doubled letters
3
Ending in S
9
Most frequent letter
R (18)

Questions

How many 12-letter words matching __o___p_____ are there?

20. 7 of them are common words.

What is a common example?

APOCRYPHALLY is among the common words in this set.