What are some seven letter words with 2nd letter T and 3rd letter A and 4th letter C and 7th letter M?

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

etacism

itacism