How many words could one make with this combination of letters?All in all, you can make 3 words.
What is the largest word you can derive using words that start with 'ik' and include 'y'?The longest word you could derive from this list is 'ikeyness', and it has 8 characters.
What is the highest score you could get in Scrabble using this list of words starting with 'ik' that contain 'y'?The only choice is 'ikeyness' scoring 15 points.