Also of interest:

estramacon = sacrament + o
crassament = sacrament + s
canaster = sacrament - m

I thought it might be fun to write something to generate "near" variations as well. Does anyone know where I can get an official Scrabble word list, instead of the somewhat mediocre dictionary file I'm working with right now? I promise not to use it to cheat in Scrabble :)