15-Letter Words Matching ____ET_________

There are 20 15-letter words that match ____ET_________. 5 are common words, such as COMPETITIVENESS and FORGETFULNESSES. A rarer one is SYMMETRIZATIONS. In this set, R is the most frequent open letter (19 words). 7 words contain a doubled letter.

Full list 20

competitivenessforgetfulnessesmarketabilitiessecretivenessesunpretentiouslyoxytetracyclinecarpetbaggeriescatheterizationgeometrizationsmagnetoelectricnonmetaphoricalnonmetropolitanproletarianisedproletarianisesproletarianizedproletarianizesregretfulnessessubmetacentricssymmetricalnesssymmetrizations

About this list

Words
20 (5 common words)
Common example
competitiveness
Rare example
symmetrizations
Doubled letters
7
Ending in S
12
Most frequent letter
R (19)

Questions

How many 15-letter words matching ____et_________ are there?

20. 5 of them are common words.

What is a common example?

COMPETITIVENESS is among the common words in this set.