Words that start with 'p' and contain 'efe'

Which word on this page is the most common?
We're able to verify that 'prefer' is the 3017^th most common word.

Is there a word from this page of word that starts with 'p' and includes 'efe' that could be deemed as unique?
The most strange word from this list is 'prefecundation'. According to the dictionary, 'prefecundation' is defined as "A term collectively applied to the changes or conditions preceding fecundation, especially to the changes which the ovum undergoes before fecundation.".

What is the highest score you can get in Scrabble from this list of words starting with 'p' that contain 'efe'?
From this combination of letters, the best word to play is 'praefect' scoring 15 points.

What is the longest word you can derive using words that start with 'p' and include 'efe'?
'prefertilization' (16 characters)

How many actual words are possible to make with this list?
It's possible to make 74 words with this list.