15-Letter Words Matching _____ET________

There are 15 15-letter words that match _____ET________. 2 are common words, such as DEMONETIZATIONS and IMPENETRABILITY. A rarer one is SEMIRETIREMENTS. In this set, I is the most frequent open letter (15 words). 2 words contain a doubled letter.

Full list 15

demonetizationsimpenetrabilityparametrizationallotetraploidsallotetraploidyantimetabolitesautotetraploidsautotetraploidyconcretizationscyanoethylatingcyanoethylationendometriosisesholometabolismsremonetizationssemiretirements

About this list

Words
15 (2 common words)
Common example
demonetizations
Rare example
semiretirements
Doubled letters
2
Ending in S
9
Most frequent letter
I (15)

Questions

How many 15-letter words matching _____et________ are there?

15. 2 of them are common words.

What is a common example?

DEMONETIZATIONS is among the common words in this set.