Which word in particular from this list has the largest letter count?'Arccosine' is the largest word that Dictionarypedia could assemble.
What is the highest scoring word you can play in Scrabble ?Your only viable option is 'arccos' scoring 10 points.
How many words can you make using the specified combination?On this page of words starting with 'a' that contain 'rcc', you have 2 combinations that are available.