What are some six letter words with 2nd letter Y and 3rd letter A and 4th letter S and 5th letter E and 6th letter S?

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 4 words with the pattern -YASES. That is, six letter words with 2nd letter Y and 3rd letter A and 4th letter S and 5th letter E and 6th letter S. In alphabetical order, they are:

eyases

lyases

myases

nyases