15-Letter Words Matching ________O_____T

There are 19 15-letter words that match ________O_____T. 2 are common words, such as ENDOCRINOLOGIST and OPHTHALMOLOGIST. A rarer one is SEDIMENTOLOGIST. In this set, I is the most frequent open letter (18 words). 4 words contain a doubled letter.

Full list 19

endocrinologistophthalmologistantinationalistbiotechnologistconventionalistgeochronologistpsychobiologistantiferromagnetantirationalistchemotaxonomistchronobiologistconfessionalistcountermovementcryptozoologistdaguerreotypistgeomorphologistphenomenologistroentgenologistsedimentologist

About this list

Words
19 (2 common words)
Common example
endocrinologist
Rare example
sedimentologist
Doubled letters
4
Ending in S
0
Most frequent letter
I (18)

Questions

How many 15-letter words matching ________o_____t are there?

19. 2 of them are common words.

What is a common example?

ENDOCRINOLOGIST is among the common words in this set.