Words with 'fac' at the start and 's' at the end

Is there a word from this page of word that starts with 'fac' and ends with 's' that could be considered as unusual in any regard?
'Factitious' certainly ranks as the most strange word in our list of words that start with 'fac' and end with 's'. 'Factitious' is defined as "Made by art, in distinction from what is produced by nature; artificial; sham; formed by, or adapted to, an artificial or conventional, in distinction from a natural, standard or rule; not natural; as, factitious cinnabar or jewels; a factitious taste. -- Fac-ti"tious*ly, adv. -- Fac*ti"tious-ness, n. He acquires a factitious...", according to the English dictionary.

What's the highest number of points you're able to get in Scrabble using this list of words that start with 'fac' and end with 's'?
It is possible to make 'fackings' which scores 18 points in Scrabble.

What's the most popular word on this page?
When it comes to well-known words, there's 'facts' which ranks as the 1623^rd most common word.

What's the total number of words you are able to put together using this combination of letters?
It's possible to create 42 words with the specified letter combination.

What's the longest word you can construct with this list?
The word 'facinorousness' is made up of 14 characters.