What are some seven letter words with 3rd letter A and 4th letter C and 6th letter S and 7th letter M?

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern --AC-SM. That is, seven letter words with 3rd letter A and 4th letter C and 6th letter S and 7th letter M. In alphabetical order, they are:

etacism

itacism