In total, how many words are possible to make using this combination of letters?In total, one can make exactly 68 words.
Is there an example word from this page of word that has 'ey' in and ends with 'es' which might be considered as unique?By far the most weird word from this list is 'cheyennes'. The conventional definition of 'cheyennes' is as follows: "A warlike tribe of indians, related to the blackfeet, formerly inhabiting the region of Wyoming, but now mostly on reservations in the Indian Territory. They are noted for their horsemanship.". Source Oxford Dictionary.
In Scrabble, what's the most points possible using this list of words that contain 'ey' and end in 'es'?For a score of 20 points in Scrabble, you can play 'hickeyes'.
What's the most common word that has 'ey' in and ends with 'es'?The most common word for your search is 'eyes'.
What is the largest word you can derive from the combination searched for?There are 12 characters in the word 'eyewitnesses', making it the longest word Dictionarypedia has.