Words with 'f' at the start and 'nal' at the end

What's the maximum number of words you could put together from this combination of letters?
Altogether, there are 31 words.

What is an interesting word from all the word combos available ?
The most unusual word based on a recently conducted poll is 'final'. According to the Oxford dictionary, 'final' means "1. Pertaining to the end or conclusion; last; terminating; ultimate; as, the final day of a school term. Yet despair not of his final pardon. Milton. 2. Conclusive; decisive; as, a final judgment; the battle of Waterloo brought the contest to a final issue. 3. Respecting an end or object...".

Is there any word on this page that stands out as the most common?
As far as well-known words go, there's 'final', which is the 1905^th most common word.

In Scrabble, what is the best score you can get using words that start with 'f' and end with 'nal'?
One can make 'feminal' scoring 12 in Scrabble.

What's the biggest word you can assemble with this list?
The largest word that's possible to derive from the combination searched for is 'fertilisational', which is made up of 15 characters.