What are some four letter words with 2nd letter Y and 3rd letter A and 4th letter S?

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

eyas

nyas

pyas

ryas