Words that start with 'f' and contain 'z'

Which word that starts with 'f' and includes 'z' is the most common word in the dictionary?
The most well-known word is 'frozen', which is in fact the 6023^rd most common word in this list.

What's a weird word from all the combinations available ?
The most peculiar word in this list is 'factorize'. According to the Oxford dictionary, 'factorize' is defined as "(a) To give warning to; -- said of a person in whose hands the effects of another are attached, the warning being to the effect that he shall not pay the money or deliver the property of the defendant in his hands to him, but appear and answer the suit...".

What's the maximum number of words you can put together from words that start with 'f' and include 'z'?
On this page of words that start with 'f' and include 'z', you have 412 unique combinations that can be selected.

How many letters does the biggest word from this list consist of?
'fractionalization'!

What is the best score you can get in Scrabble using this list of words starting with 'f' that contain 'z'?
As there are loads of words to pick from, you may want to go for 'fezziwig' scoring 33 points overall.