15-Letter Words Matching _______OP______

There are 18 15-letter words that match _______OP______. 4 are common words, such as CLAUSTROPHOBIAS and MICROSCOPICALLY. A rarer one is PHOTOTROPICALLY. In this set, A is the most frequent open letter (18 words). 6 words contain a doubled letter.

Full list 18

claustrophobiasmicroscopicallymisappropriatedmisappropriatesachondroplasiasanthropophagiteanthropophagousmacroscopicallymercaptopurinesachondroplasticanisotropicallyanthropopathismanthropophagiesantimonopolistsbacteriophagieschlorpropamidesnonmetropolitanphototropically

About this list

Words
18 (4 common words)
Common example
claustrophobias
Rare example
phototropically
Doubled letters
6
Ending in S
9
Most frequent letter
A (18)

Questions

How many 15-letter words matching _______op______ are there?

18. 4 of them are common words.

What is a common example?

CLAUSTROPHOBIAS is among the common words in this set.