15-Letter Words Matching _____E____R____

There are 16 15-letter words that match _____E____R____. 4 are common words, such as ANTIPERSPIRANTS and BUSINESSPERSONS. A rarer one is PHOTOELECTRONIC. In this set, O is the most frequent open letter (15 words). 4 words contain a doubled letter.

Full list 16

antiperspirantsbusinesspersonscongresspersonsmicroelectronicarchaeopteryxescountercurrentsphotoelectricalpiezoelectricalweatherboardingcounterchargingcounterguerillainterelectrodesinterelectronicmicroelectrodesparthenocarpiesphotoelectronic

About this list

Words
16 (4 common words)
Common example
antiperspirants
Rare example
photoelectronic
Doubled letters
4
Ending in S
8
Most frequent letter
O (15)

Questions

How many 15-letter words matching _____e____r____ are there?

16. 4 of them are common words.

What is a common example?

ANTIPERSPIRANTS is among the common words in this set.