15-Letter Words Matching __R________A___

There are 22 15-letter words that match __R________A___. 7 are common words, such as AERODYNAMICALLY and CHRONOLOGICALLY. A rarer one is XERORADIOGRAPHY. In this set, I is the most frequent open letter (22 words). 15 words contain a doubled letter.

Full list 22

aerodynamicallychronologicallycircumnavigatedcircumnavigatesparentheticallyperpendicularlyunrealisticallycircumambulatedcircumambulateshermeneuticallyhorticulturallymorphologicallyperipateticallyperistalticallyphrenologicallyxerographicallycircumnavigatormartensiticallymeroblasticallyparageneticallypyrotechnicallyxeroradiography

About this list

Words
22 (7 common words)
Common example
aerodynamically
Rare example
xeroradiography
Doubled letters
15
Ending in S
2
Most frequent letter
I (22)

Questions

How many 15-letter words matching __r________a___ are there?

22. 7 of them are common words.

What is a common example?

AERODYNAMICALLY is among the common words in this set.