13-Letter Words Matching A_____R______

There are 40 13-letter words that match A_____R______. 14 are common words, such as ACCELERATIONS and ACCOUTREMENTS. A rarer one is APPROPRIATIVE. In this set, I is the most frequent open letter (37 words). 20 words contain a doubled letter.

Full list 40

Common words

accelerationsaccoutrementsadulterationsallegoricallyalliterationsameliorationsanniversariesantiparticlesantipersonnelappropriatelyappropriatingappropriation
accelerationsaccoutrementsadulterationsallegoricallyalliterationsameliorationsanniversariesantiparticlesantipersonnelappropriatelyappropriatingappropriationappropriatorsasseverationsaccelerometeramphiprostyleanemographiesangiographiesantichristiananticorrosiveantifertilityantiparasiticantiterrorismantiterroristasynchronismsautomorphismsagroforestersallomorphismsanaphoricallyanisotropismsantiaircraftsanticorporateanticorrosionantiforeignerantiformalistantimarijuanaantinarrativeantithrombinsaortographiesappropriative

About this list

Words
40 (14 common words)
Common example
accelerations
Rare example
appropriative
Doubled letters
20
Ending in S
19
Most frequent letter
I (37)

Questions

How many 13-letter words matching a_____r______ are there?

40. 14 of them are common words.

What is a common example?

ACCELERATIONS is among the common words in this set.