12-Letter Words Matching __PT________

There are 13 12-letter words that match __PT________. 3 are common words, such as BAPTISTERIES and CAPTIOUSNESS. A rarer one is SEPTENTRIONS. In this set, I is the most frequent open letter (13 words). 3 words contain a doubled letter.

Full list 13

baptisteriescaptiousnesscaptivationscaptainshipsseptenniallyseptilateralseptillionthseptuplicatedipterocarpshaptoglobinsleptocephalinuptialitiesseptentrions

About this list

Words
13 (3 common words)
Common example
baptisteries
Rare example
septentrions
Doubled letters
3
Ending in S
8
Most frequent letter
I (13)

Questions

How many 12-letter words matching __pt________ are there?

13. 3 of them are common words.

What is a common example?

BAPTISTERIES is among the common words in this set.