11-Letter Words Matching A_________R

There are 28 11-letter words that match A_________R. 10 are common words, such as ACCELERATOR and ACCUMULATOR. A rarer one is ANTITRUSTER. In this set, T is the most frequent open letter (26 words). 9 words contain a doubled letter.

Full list 28

Common words

acceleratoraccumulatoradjudicatorafterburnerairworthierannihilatorantechamberantinuclearappreciatorarbitrageurabbreviatoractinometer
acceleratoraccumulatoradjudicatorafterburnerairworthierannihilatorantechamberantinuclearappreciatorarbitrageurabbreviatoractinometeradulteratoraggrandizeralkalimeteramelioratoramphistylarannunciatoranticipatorarticulatorasphyxiatorassimilatorazotobacterallegorizeramalgamatorantiburglarantipopularantitruster

About this list

Words
28 (10 common words)
Common example
accelerator
Rare example
antitruster
Doubled letters
9
Ending in S
0
Most frequent letter
T (26)

Questions

How many 11-letter words matching a_________r are there?

28. 10 of them are common words.

What is a common example?

ACCELERATOR is among the common words in this set.