Which word in particular from this list has the largest letter count?'Fdname' is the longest word that the Dictionarypedia database could construct, made up of 6 letters
How many words can you make using the combination searched for?One can derive 2 words with the combination you specified.
What's the highest scoring word you can play in Scrabble ?The only option is 'fdtype' which scores 15 points.