12-Letter Words Matching ___P______I_

There are 20 12-letter words that match ___P______I_. 2 are common words, such as PROPHYLACTIC and UNAPOLOGETIC. A rarer one is TROPHALLAXIS. In this set, O is the most frequent open letter (16 words). 3 words contain a doubled letter.

Full list 20

prophylacticunapologeticchaplainshipherpetologiclymphangitisnonparasiticpropaedeuticsalpiglossistroposphericanaphylacticanaplasmosiscompatrioticdysphemisticexophthalmicmorphallaxismorphometricnonpsychoticnympholepticporphyropsintrophallaxis

About this list

Words
20 (2 common words)
Common example
prophylactic
Rare example
trophallaxis
Doubled letters
3
Ending in S
5
Most frequent letter
O (16)

Questions

How many 12-letter words matching ___p______i_ are there?

20. 2 of them are common words.

What is a common example?

PROPHYLACTIC is among the common words in this set.