Code:
on 1:TEXT:*:#yourchannelhere:{
  if ($istok($read(C:\swear.txt),$1-,32) == $true) {
    kick $chan $nick Swearing is not allowed
  }
}

change C:\swear.txt to ur file and write swear.txt as a worrd on each line. u might want to copy that code and change text to ACTION also cause ppl could /me says cusswordhere