13-Letter Words Matching ________E___R

There are 18 13-letter words that match ________E___R. 3 are common words, such as COUNTERFEITER and FORTUNETELLER. A rarer one is SUPERCALENDER. In this set, E is the most frequent open letter (16 words). 7 words contain a doubled letter.

Full list 18

counterfeiterfortunetellerstrikebreakersuperspreaderchemoreceptorgroundskeeperintelligencermiddlebreakerphotoreceptorproprioceptorcircumstellarcounterterrordoublespeakerelectioneerergroundbreakerinterobserverphotodetectorsupercalender

About this list

Words
18 (3 common words)
Common example
counterfeiter
Rare example
supercalender
Doubled letters
7
Ending in S
0
Most frequent letter
E (16)

Questions

How many 13-letter words matching ________e___r are there?

18. 3 of them are common words.

What is a common example?

COUNTERFEITER is among the common words in this set.