15-Letter Words Matching __O______O_____

There are 23 15-letter words that match __O______O_____. 4 are common words, such as PROHIBITIONISTS and TROUBLESHOOTERS. A rarer one is PROTOZOOLOGISTS. In this set, T is the most frequent open letter (22 words). 5 words contain a doubled letter.

Full list 23

prohibitioniststroubleshooterstroubleshootingunobjectionablephosphoproteinsphotomicrographphotomicroscopeapolipoproteinsbronchoscopistscholecystokininchordamesodermscooperationistsexoerythrocyticgeohydrologistsphotobiologicalphotobiologistsphotodissociatephotogeologicalphotogeologistsphotolithographphotoperiodismsprotohistoriansprotozoologists

About this list

Words
23 (4 common words)
Common example
prohibitionists
Rare example
protozoologists
Doubled letters
5
Ending in S
13
Most frequent letter
T (22)

Questions

How many 15-letter words matching __o______o_____ are there?

23. 4 of them are common words.

What is a common example?

PROHIBITIONISTS is among the common words in this set.