15-Letter Words Matching _____X_________

There are 12 15-letter words that match _____X_________. 2 are common words, such as CONTEXTUALIZING and INFLEXIBILITIES. A rarer one is OVEREXTRAVAGANT. In this set, E is the most frequent open letter (12 words). 3 words contain a doubled letter.

Full list 12

contextualizinginflexibilitiesreflexivenesseshydroxyapatiteshydroxylapatitehydroxyprolinesmethoxyfluranesoverexaggeratedoverexaggeratesoverexpectationoverextractionsoverextravagant

About this list

Words
12 (2 common words)
Common example
contextualizing
Rare example
overextravagant
Doubled letters
3
Ending in S
7
Most frequent letter
E (12)

Questions

How many 15-letter words matching _____x_________ are there?

12. 2 of them are common words.

What is a common example?

CONTEXTUALIZING is among the common words in this set.