13-Letter Words Matching ___N______A__

There are 20 13-letter words that match ___N______A__. 5 are common words, such as COUNTERATTACK and FOUNTAINHEADS. A rarer one is TRANSMOUNTAIN. In this set, E is the most frequent open letter (18 words). 4 words contain a doubled letter.

Full list 20

counterattackfountainheadsreincorporatethenceforwardtransliterateplanetesimalsquincentenaryquintuplicatereinvestigatethundersqualltransitionarycounterdemandcyanoacrylatecyanoethylatenonnumericalsquinquennialsrhinencephalatranscriptasetransmembranetransmountain

About this list

Words
20 (5 common words)
Common example
counterattack
Rare example
transmountain
Doubled letters
4
Ending in S
4
Most frequent letter
E (18)

Questions

How many 13-letter words matching ___n______a__ are there?

20. 5 of them are common words.

What is a common example?

COUNTERATTACK is among the common words in this set.