15-Letter Words Matching ____N_A________

There are 20 15-letter words that match ____N_A________. 7 are common words, such as DECONTAMINATING and DECONTAMINATION. A rarer one is VOLUNTARINESSES. 6 words contain a doubled letter.

Full list 20

decontaminatingdecontaminationdependabilitiesdisentanglementmomentarinessesreconnaissancesrecontaminatingrecontaminationdecontaminatorsexpandabilitiesexpendabilitiesextendabilitiesimmunoassayablenonantagonisticnonencapsulatedorientationallypatentabilitiesrefundabilitiessecondarinessesvoluntarinesses

About this list

Words
20 (7 common words)
Common example
decontaminating
Rare example
voluntarinesses
Doubled letters
6
Ending in S
11

Questions

How many 15-letter words matching ____n_a________ are there?

20. 7 of them are common words.

What is a common example?

DECONTAMINATING is among the common words in this set.