How many viable words could one make using the combination specified?You can go with up to 4 entries.
How many characters are in the longest word on this list?The largest word you could construct from the specified combination is 'longcloth', which has 9 characters.
What is the highest scoring word in Scrabble you can play for ?As there are only attainable, you're only practical option is 'lingcods' scoring 12 points.