15-Letter Words Matching _____P_____A___

There are 22 15-letter words that match _____P_____A___. 4 are common words, such as ATMOSPHERICALLY and MISAPPROPRIATED. A rarer one is SUPERPHOSPHATES. In this set, I is the most frequent open letter (20 words). 12 words contain a doubled letter.

Full list 22

atmosphericallymisappropriatedmisappropriatestherapeuticallyhomeopathicallyinterpenetratedinterpenetratesinterpersonallyneuropsychiatryorthopsychiatryosteopathicallysaprophyticallyuncompromisableaminopeptidasesastrophysicallyionosphericallymicrophysicallyneuropathicallynonsaponifiableorthophosphatesoveropinionatedsuperphosphates

About this list

Words
22 (4 common words)
Common example
atmospherically
Rare example
superphosphates
Doubled letters
12
Ending in S
5
Most frequent letter
I (20)

Questions

How many 15-letter words matching _____p_____a___ are there?

22. 4 of them are common words.

What is a common example?

ATMOSPHERICALLY is among the common words in this set.