15-Letter Words Matching A______R_______

There are 20 15-letter words that match A______R_______. 5 are common words, such as ADVENTUROUSNESS and ANTIABORTIONIST. A rarer one is AUTOTETRAPLOIDY. In this set, I is the most frequent open letter (19 words). 11 words contain a doubled letter.

Full list 20

adventurousnessantiabortionistantidepressantsantiquarianismsarbitrarinessesadenocarcinomasanticlericalismautocorrelationacculturationaladversarinessesallotetraploidsallotetraploidyantiaphrodisiacanticlericalistanticorruptionsantidepressionsantiferromagnetantisegregationautotetraploidsautotetraploidy

About this list

Words
20 (5 common words)
Common example
adventurousness
Rare example
autotetraploidy
Doubled letters
11
Ending in S
10
Most frequent letter
I (19)

Questions

How many 15-letter words matching a______r_______ are there?

20. 5 of them are common words.

What is a common example?

ADVENTUROUSNESS is among the common words in this set.