Words beginning with 'ref'

What is the highest scoring word in Scrabble using the above combination ?
With a vast 582 entries, your best option is 'reffroze' scoring 23 points.

What word from this list is the most unusual?
Dictionarypedia thinks 'referrer' to be the most interesting word you can assemble. The dictionary defines it as "One who refers.".

How many characters does the longest word from this page contain?
The longest word is 17 letters, which is 'refamiliarization'.

Which word that starts with 'ref' is the most popular word in the dictionary?
We've identified that 'refund' is the 1374^th most common word.

What is the maximum number of words you're able to construct using this combination of letters?
In total, it is feasible to make 582 words.