15-Letter Words Matching ____R_______L__

There are 21 15-letter words that match ____R_______L__. 6 are common words, such as BIDIRECTIONALLY and CONTROVERSIALLY. A rarer one is VENTRILOQUIALLY. In this set, A is the most frequent open letter (21 words). 19 words contain a doubled letter.

Full list 21

bidirectionallycontroversiallyenvironmentallygastronomicallyhypercriticallyinternationallyalgorithmicallycongressionallygastrologicallyinterpersonallylogarithmicallymineralogicallyobservationallyproprietoriallysynergisticallyepeirogenicallyinformationallyinterculturallynoncredentialedsuperspectaclesventriloquially

About this list

Words
21 (6 common words)
Common example
bidirectionally
Rare example
ventriloquially
Doubled letters
19
Ending in S
1
Most frequent letter
A (21)

Questions

How many 15-letter words matching ____r_______l__ are there?

21. 6 of them are common words.

What is a common example?

BIDIRECTIONALLY is among the common words in this set.