What are some nine letter words with 2nd letter H and 4th letter A and 5th letter C and 9th letter S?

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 Words with the pattern -H-AC---S. That is, nine letter Words with 2nd letter H and 4th letter A and 5th letter C and 9th letter S. In alphabetical order, they are:

theaceous

thwackers