13-Letter Words Matching ___N____H____

There are 18 13-letter words that match ___N____H____. 6 are common words, such as FOUNTAINHEADS and GRANDFATHERED. A rarer one is PHENYLEPHRINE. In this set, E is the most frequent open letter (17 words). 2 words contain a doubled letter.

Full list 18

fountainheadsgrandfatheredgrandfatherlygrandmotherlyspinsterhoodsthundershowercounterchangecounterchargecountercheckscountinghousegymnosophistsherniorrhaphycounterthreatcounterthrustdeinonychusesopenmouthedlyphanerophytesphenylephrine

About this list

Words
18 (6 common words)
Common example
fountainheads
Rare example
phenylephrine
Doubled letters
2
Ending in S
6
Most frequent letter
E (17)

Questions

How many 13-letter words matching ___n____h____ are there?

18. 6 of them are common words.

What is a common example?

FOUNTAINHEADS is among the common words in this set.