14-Letter Words Matching _N__________R_

There are 21 14-letter words that match _N__________R_. 6 are common words, such as INFRASTRUCTURE and INTERPLANETARY. A rarer one is UNDERSTRAPPERS. In this set, E is the most frequent open letter (18 words). 5 words contain a doubled letter.

Full list 21

infrastructureinterplanetaryknickerbockersunderachieversundersecretaryunsatisfactoryindoctrinatorsindoctrinatoryinterferometryknuckledustersunderstructureantiregulatoryintelligencersinterbehaviorsinterobserversinterpellatorsinterpupillaryknuckleballersuncontemporaryundergroundersunderstrappers

About this list

Words
21 (6 common words)
Common example
infrastructure
Rare example
understrappers
Doubled letters
5
Ending in S
11
Most frequent letter
E (18)

Questions

How many 14-letter words matching _n__________r_ are there?

21. 6 of them are common words.

What is a common example?

INFRASTRUCTURE is among the common words in this set.